| Seat | Country | Last Win | 2015 Fav |
| 1. Aberavon | Wales | LAB | LAB |
| 2. Aberconwy | Wales | CON | CON |
| 3. Aberdeen North | Scotland | LAB | SNP |
| 4. Aberdeen South | Scotland | LAB | SNP |
| 5. Airdrie and Shotts | Scotland | LAB | SNP |
| 6. Aldershot | England | CON | CON |
| 7. Aldridge-Brownhills | England | CON | CON |
| 8. Altrincham and Sale West | England | CON | CON |
| 9. Alyn and Deeside | Wales | LAB | LAB |
| 10. Amber Valley | England | CON | LAB |
| 11. Angus | Scotland | SNP | SNP |
| 12. Arfon | Wales | PC | PC |
| 13. Argyll and Bute | Scotland | LIB | SNP |
| 14. Arundel and South Downs | England | CON | CON |
| 15. Ashfield | England | LAB | LAB |
| 16. Ashford | England | CON | CON |
| 17. Ashton-under-Lyne | England | LAB | LAB |
| 18. Aylesbury | England | CON | CON |
| 19. Ayr, Carrick and Cumnock | Scotland | LAB | SNP |
| 20. Banbury | England | CON | CON |
| 21. Banff and Buchan | Scotland | SNP | SNP |
| 22. Barking | England | LAB | LAB |
| 23. Barnsley Central | England | LAB | LAB |
| 24. Barnsley East | England | LAB | LAB |
| 25. Barrow and Furness | England | LAB | LAB |
| 26. Basildon and Billericay | England | CON | CON |
| 27. Basingstoke | England | CON | CON |
| 28. Bassetlaw | England | LAB | LAB |
| 29. Bath | England | LIB | LIB |
| 30. Batley and Spen | England | LAB | LAB |
| 31. Battersea | England | CON | CON |
| 32. Beaconsfield | England | CON | CON |
| 33. Beckenham | England | CON | CON |
| 34. Bedford | England | CON | LAB |
| 35. Belfast East | Northern Ireland | APNI | DUP |
| 36. Belfast North | Northern Ireland | DUP | DUP |
| 37. Belfast South | Northern Ireland | SDLP | SDLP |
| 38. Belfast West | Northern Ireland | SF | SF |
| 39. Bermondsey and Old Southwark | England | LIB | LIB |
| 40. Berwick-upon-Tweed | England | LIB | CON |
| 41. Berwickshire, Roxburgh and Selkirk | Scotland | LIB | CON |
| 42. Bethnal Green and Bow | England | LAB | LAB |
| 43. Beverley and Holderness | England | CON | CON |
| 44. Bexhill and Battle | England | CON | CON |
| 45. Bexleyheath and Crayford | England | CON | CON |
| 46. Birkenhead | England | LAB | LAB |
| 47. Birmingham, Edgbaston | England | LAB | LAB |
| 48. Birmingham, Erdington | England | LAB | LAB |
| 49. Birmingham, Hall Green | England | LAB | LAB |
| 50. Birmingham, Hodge Hill | England | LAB | LAB |
| 51. Birmingham, Ladywood | England | LAB | LAB |
| 52. Birmingham, Northfield | England | LAB | LAB |
| 53. Birmingham, Perry Barr | England | LAB | LAB |
| 54. Birmingham, Selly Oak | England | LAB | LAB |
| 55. Birmingham, Yardley | England | LIB | LAB |
| 56. Bishop Auckland | England | LAB | LAB |
| 57. Blackburn | England | LAB | LAB |
| 58. Blackley and Broughton | England | LAB | LAB |
| 59. Blackpool North and Cleveleys | England | CON | CON |
| 60. Blackpool South | England | LAB | LAB |
| 61. Blaenau Gwent | Wales | LAB | LAB |
| 62. Blaydon | England | LAB | LAB |
| 63. Blyth Valley | England | LAB | LAB |
| 64. Bognor Regis and Littlehampton | England | CON | CON |
| 65. Bolsover | England | LAB | LAB |
| 66. Bolton North East | England | LAB | LAB |
| 67. Bolton South East | England | LAB | LAB |
| 68. Bolton West | England | LAB | LAB |
| 69. Bootle | England | LAB | LAB |
| 70. Boston and Skegness | England | CON | CON |
| 71. Bosworth | England | CON | CON |
| 72. Bournemouth East | England | CON | CON |
| 73. Bournemouth West | England | CON | CON |
| 74. Bracknell | England | CON | CON |
| 75. Bradford East | England | LIB | LAB |
| 76. Bradford South | England | LAB | LAB |
| 77. Bradford West | England | RESP | RESP |
| 78. Braintree | England | CON | CON |
| 79. Brecon and Radnorshire | Wales | LIB | LIB |
| 80. Brent Central | England | LIB | LAB |
| 81. Brent North | England | LAB | LAB |
| 82. Brentford and Isleworth | England | CON | LAB |
| 83. Brentwood and Ongar | England | CON | CON |
| 84. Bridgend | Wales | LAB | LAB |
| 85. Bridgwater and West Somerset | England | CON | CON |
| 86. Brigg and Goole | England | CON | CON |
| 87. Brighton, Kemptown | England | CON | LAB |
| 88. Brighton, Pavilion | England | GRN | GRN |
| 89. Bristol East | England | LAB | LAB |
| 90. Bristol North West | England | CON | CON |
| 91. Bristol South | England | LAB | LAB |
| 92. Bristol West | England | LIB | LAB |
| 93. Broadland | England | CON | CON |
| 94. Bromley and Chislehurst | England | CON | CON |
| 95. Bromsgrove | England | CON | CON |
| 96. Broxbourne | England | CON | CON |
| 97. Broxtowe | England | CON | LAB |
| 98. Buckingham | England | SPK | SPK |
| 99. Burnley | England | LIB | LAB |
| 100. Burton | England | CON | CON |
| 101. Bury North | England | CON | LAB |
| 102. Bury South | England | LAB | LAB |
| 103. Bury St Edmunds | England | CON | CON |
| 104. Caerphilly | Wales | LAB | LAB |
| 105. Caithness, Sutherland and Easter Ross | Scotland | LIB | SNP |
| 106. Calder Valley | England | CON | CON |
| 107. Camberwell and Peckham | England | LAB | LAB |
| 108. Camborne and Redruth | England | CON | CON |
| 109. Cambridge | England | LIB | LIB |
| 110. Cannock Chase | England | CON | LAB |
| 111. Canterbury | England | CON | CON |
| 112. Cardiff Central | Wales | LIB | LAB |
| 113. Cardiff North | Wales | CON | LAB |
| 114. Cardiff South and Penarth | Wales | LAB | LAB |
| 115. Cardiff West | Wales | LAB | LAB |
| 116. Carlisle | England | CON | LAB |
| 117. Carmarthen East and Dinefwr | Wales | PC | PC |
| 118. Carmarthen West and South Pembrokeshire | Wales | CON | CON |
| 119. Carshalton and Wallington | England | LIB | LIB |
| 120. Castle Point | England | CON | CON |
| 121. Central Ayrshire | Scotland | LAB | SNP |
| 122. Central Devon | England | CON | CON |
| 123. Central Suffolk and North Ipswich | England | CON | CON |
| 124. Ceredigion | Wales | LIB | LIB |
| 125. Charnwood | England | CON | CON |
| 126. Chatham and Aylesford | England | CON | CON |
| 127. Cheadle | England | LIB | LIB |
| 128. Chelmsford | England | CON | CON |
| 129. Chelsea and Fulham | England | CON | CON |
| 130. Cheltenham | England | LIB | LIB |
| 131. Chesham and Amersham | England | CON | CON |
| 132. City of Chester | England | CON | LAB |
| 133. Chesterfield | England | LAB | LAB |
| 134. Chichester | England | CON | CON |
| 135. Chingford and Woodford Green | England | CON | CON |
| 136. Chippenham | England | LIB | CON |
| 137. Chipping Barnet | England | CON | CON |
| 138. Chorley | England | LAB | LAB |
| 139. Christchurch | England | CON | CON |
| 140. Cities of London and Westminster | England | CON | CON |
| 141. Clacton | England | UKP | UKP |
| 142. Cleethorpes | England | CON | CON |
| 143. Clwyd South | Wales | LAB | LAB |
| 144. Clwyd West | Wales | CON | CON |
| 145. Coatbridge, Chryston and Bellshill | Scotland | LAB | SNP |
| 146. Colchester | England | LIB | LIB |
| 147. Colne Valley | England | CON | CON |
| 148. Congleton | England | CON | CON |
| 149. Copeland | England | LAB | LAB |
| 150. Corby | England | LAB | LAB |
| 151. The Cotswolds | England | CON | CON |
| 152. Coventry North East | England | LAB | LAB |
| 153. Coventry North West | England | LAB | LAB |
| 154. Coventry South | England | LAB | LAB |
| 155. Crawley | England | CON | CON |
| 156. Crewe and Nantwich | England | CON | CON |
| 157. Croydon Central | England | CON | CON |
| 158. Croydon North | England | LAB | LAB |
| 159. Croydon South | England | CON | CON |
| 160. Cumbernauld, Kilsyth and Kirkintilloch East | Scotland | LAB | SNP |
| 161. Cynon Valley | Wales | LAB | LAB |
| 162. Dagenham and Rainham | England | LAB | LAB |
| 163. Darlington | England | LAB | LAB |
| 164. Dartford | England | CON | CON |
| 165. Daventry | England | CON | CON |
| 166. Delyn | Wales | LAB | LAB |
| 167. Denton and Reddish | England | LAB | LAB |
| 168. Derby North | England | LAB | LAB |
| 169. Derby South | England | LAB | LAB |
| 170. Derbyshire Dales | England | CON | CON |
| 171. Devizes | England | CON | CON |
| 172. Dewsbury | England | CON | LAB |
| 173. Don Valley | England | LAB | LAB |
| 174. Doncaster Central | England | LAB | LAB |
| 175. Doncaster North | England | LAB | LAB |
| 176. Dover | England | CON | CON |
| 177. Dudley North | England | LAB | LAB |
| 178. Dudley South | England | CON | CON |
| 179. Dulwich and West Norwood | England | LAB | LAB |
| 180. Dumfries and Galloway | Scotland | LAB | SNP |
| 181. Dumfriesshire, Clydesdale and Tweeddale | Scotland | CON | SNP |
| 182. Dundee East | Scotland | SNP | SNP |
| 183. Dundee West | Scotland | LAB | SNP |
| 184. Dunfermline and West Fife | Scotland | LAB | SNP |
| 185. City of Durham | England | LAB | LAB |
| 186. Dwyfor Meirionnydd | Wales | PC | PC |
| 187. Ealing Central and Acton | England | CON | LAB |
| 188. Ealing North | England | LAB | LAB |
| 189. Ealing, Southall | England | LAB | LAB |
| 190. Easington | England | LAB | LAB |
| 191. East Antrim | Northern Ireland | DUP | DUP |
| 192. East Devon | England | CON | CON |
| 193. East Dunbartonshire | Scotland | LIB | SNP |
| 194. East Ham | England | LAB | LAB |
| 195. East Hampshire | England | CON | CON |
| 196. East Kilbride, Strathaven and Lesmahagow | Scotland | LAB | SNP |
| 197. East Londonderry | Northern Ireland | DUP | DUP |
| 198. East Lothian | Scotland | LAB | SNP |
| 199. East Renfrewshire | Scotland | LAB | SNP |
| 200. East Surrey | England | CON | CON |
| 201. East Worthing and Shoreham | England | CON | CON |
| 202. East Yorkshire | England | CON | CON |
| 203. Eastbourne | England | LIB | LIB |
| 204. Eastleigh | England | LIB | LIB |
| 205. Eddisbury | England | CON | CON |
| 206. Edinburgh East | Scotland | LAB | SNP |
| 207. Edinburgh North and Leith | Scotland | LAB | SNP |
| 208. Edinburgh South | Scotland | LAB | LAB |
| 209. Edinburgh South West | Scotland | LAB | SNP |
| 210. Edinburgh West | Scotland | LIB | SNP |
| 211. Edmonton | England | LAB | LAB |
| 212. Ellesmere Port and Neston | England | LAB | LAB |
| 213. Elmet and Rothwell | England | CON | CON |
| 214. Eltham | England | LAB | LAB |
| 215. Enfield North | England | CON | LAB |
| 216. Enfield, Southgate | England | CON | CON |
| 217. Epping Forest | England | CON | CON |
| 218. Epsom and Ewell | England | CON | CON |
| 219. Erewash | England | CON | LAB |
| 220. Erith and Thamesmead | England | LAB | LAB |
| 221. Esher and Walton | England | CON | CON |
| 222. Exeter | England | LAB | LAB |
| 223. Falkirk | Scotland | LAB | SNP |
| 224. Fareham | England | CON | CON |
| 225. Faversham and Mid Kent | England | CON | CON |
| 226. Feltham and Heston | England | LAB | LAB |
| 227. Fermanagh and South Tyrone | Northern Ireland | SF | SF |
| 228. Filton and Bradley Stoke | England | CON | CON |
| 229. Finchley and Golders Green | England | CON | CON |
| 230. Folkestone and Hythe | England | CON | CON |
| 231. Forest of Dean | England | CON | CON |
| 232. Foyle | Northern Ireland | SDLP | SDLP |
| 233. Fylde | England | CON | CON |
| 234. Gainsborough | England | CON | CON |
| 235. Garston and Halewood | England | LAB | LAB |
| 236. Gateshead | England | LAB | LAB |
| 237. Gedling | England | LAB | LAB |
| 238. Gillingham and Rainham | England | CON | CON |
| 239. Glasgow Central | Scotland | LAB | SNP |
| 240. Glasgow East | Scotland | LAB | SNP |
| 241. Glasgow North | Scotland | LAB | SNP |
| 242. Glasgow North East | Scotland | LAB | LAB |
| 243. Glasgow North West | Scotland | LAB | SNP |
| 244. Glasgow South | Scotland | LAB | SNP |
| 245. Glasgow South West | Scotland | LAB | SNP |
| 246. Glenrothes | Scotland | LAB | SNP |
| 247. Gloucester | England | CON | CON |
| 248. Gordon | Scotland | LIB | SNP |
| 249. Gosport | England | CON | CON |
| 250. Gower | Wales | LAB | LAB |
| 251. Grantham and Stamford | England | CON | CON |
| 252. Gravesham | England | CON | CON |
| 253. Great Grimsby | England | LAB | LAB |
| 254. Great Yarmouth | England | CON | CON |
| 255. Greenwich and Woolwich | England | LAB | LAB |
| 256. Guildford | England | CON | CON |
| 257. Hackney North and Stoke Newington | England | LAB | LAB |
| 258. Hackney South and Shoreditch | England | LAB | LAB |
| 259. Halesowen and Rowley Regis | England | CON | CON |
| 260. Halifax | England | LAB | LAB |
| 261. Haltemprice and Howden | England | CON | CON |
| 262. Halton | England | LAB | LAB |
| 263. Hammersmith | England | LAB | LAB |
| 264. Hampstead and Kilburn | England | LAB | LAB |
| 265. Harborough | England | CON | CON |
| 266. Harlow | England | CON | CON |
| 267. Harrogate and Knaresborough | England | CON | CON |
| 268. Harrow East | England | CON | LAB |
| 269. Harrow West | England | LAB | LAB |
| 270. Hartlepool | England | LAB | LAB |
| 271. Harwich and North Essex | England | CON | CON |
| 272. Hastings and Rye | England | CON | LAB |
| 273. Havant | England | CON | CON |
| 274. Hayes and Harlington | England | LAB | LAB |
| 275. Hazel Grove | England | LIB | LIB |
| 276. Hemel Hempstead | England | CON | CON |
| 277. Hemsworth | England | LAB | LAB |
| 278. Hendon | England | CON | LAB |
| 279. Henley | England | CON | CON |
| 280. Hereford and South Herefordshire | England | CON | CON |
| 281. Hertford and Stortford | England | CON | CON |
| 282. Hertsmere | England | CON | CON |
| 283. Hexham | England | CON | CON |
| 284. Heywood and Middleton | England | LAB | LAB |
| 285. High Peak | England | CON | CON |
| 286. Hitchin and Harpenden | England | CON | CON |
| 287. Holborn and St Pancras | England | LAB | LAB |
| 288. Hornchurch and Upminster | England | CON | CON |
| 289. Hornsey and Wood Green | England | LIB | LAB |
| 290. Horsham | England | CON | CON |
| 291. Houghton and Sunderland South | England | LAB | LAB |
| 292. Hove | England | CON | LAB |
| 293. Huddersfield | England | LAB | LAB |
| 294. Huntingdon | England | CON | CON |
| 295. Hyndburn | England | LAB | LAB |
| 296. Ilford North | England | CON | CON |
| 297. Ilford South | England | LAB | LAB |
| 298. Inverclyde | Scotland | LAB | SNP |
| 299. Inverness, Nairn, Badenoch and Strathspey | Scotland | LIB | SNP |
| 300. Ipswich | England | CON | LAB |
| 301. Isle of Wight | England | CON | CON |
| 302. Islington North | England | LAB | LAB |
| 303. Islington South and Finsbury | England | LAB | LAB |
| 304. Islwyn | Wales | LAB | LAB |
| 305. Jarrow | England | LAB | LAB |
| 306. Keighley | England | CON | LAB |
| 307. Kenilworth and Southam | England | CON | CON |
| 308. Kensington | England | CON | CON |
| 309. Kettering | England | CON | CON |
| 310. Kilmarnock and Loudoun | Scotland | LAB | SNP |
| 311. Kingston and Surbiton | England | LIB | LIB |
| 312. Kingston upon Hull East | England | LAB | LAB |
| 313. Kingston upon Hull North | England | LAB | LAB |
| 314. Kingston upon Hull West and Hessle | England | LAB | LAB |
| 315. Kingswood | England | CON | CON |
| 316. Kirkcaldy and Cowdenbeath | Scotland | LAB | SNP |
| 317. Knowsley | England | LAB | LAB |
| 318. Lagan Valley | Northern Ireland | DUP | DUP |
| 319. Lanark and Hamilton East | Scotland | LAB | SNP |
| 320. Lancaster and Fleetwood | England | CON | LAB |
| 321. Leeds Central | England | LAB | LAB |
| 322. Leeds East | England | LAB | LAB |
| 323. Leeds North East | England | LAB | LAB |
| 324. Leeds North West | England | LIB | LIB |
| 325. Leeds West | England | LAB | LAB |
| 326. Leicester East | England | LAB | LAB |
| 327. Leicester South | England | LAB | LAB |
| 328. Leicester West | England | LAB | LAB |
| 329. Leigh | England | LAB | LAB |
| 330. Lewes | England | LIB | LIB |
| 331. Lewisham East | England | LAB | LAB |
| 332. Lewisham West and Penge | England | LAB | LAB |
| 333. Lewisham, Deptford | England | LAB | LAB |
| 334. Leyton and Wanstead | England | LAB | LAB |
| 335. Lichfield | England | CON | CON |
| 336. Lincoln | England | CON | LAB |
| 337. Linlithgow and East Falkirk | Scotland | LAB | SNP |
| 338. Liverpool, Riverside | England | LAB | LAB |
| 339. Liverpool, Walton | England | LAB | LAB |
| 340. Liverpool, Wavertree | England | LAB | LAB |
| 341. Liverpool, West Derby | England | LAB | LAB |
| 342. Livingston | Scotland | LAB | SNP |
| 343. Llanelli | Wales | LAB | LAB |
| 344. Loughborough | England | CON | CON |
| 345. Louth and Horncastle | England | CON | CON |
| 346. Ludlow | England | CON | CON |
| 347. Luton North | England | LAB | LAB |
| 348. Luton South | England | LAB | LAB |
| 349. Macclesfield | England | CON | CON |
| 350. Maidenhead | England | CON | CON |
| 351. Maidstone and The Weald | England | CON | CON |
| 352. Makerfield | England | LAB | LAB |
| 353. Maldon | England | CON | CON |
| 354. Manchester Central | England | LAB | LAB |
| 355. Manchester, Gorton | England | LAB | LAB |
| 356. Manchester Withington | England | LIB | LAB |
| 357. Mansfield | England | LAB | LAB |
| 358. Meon Valley | England | CON | CON |
| 359. Meriden | England | CON | CON |
| 360. Merthyr Tydfil and Rhymney | Wales | LAB | LAB |
| 361. Mid Bedfordshire | England | CON | CON |
| 362. Mid Derbyshire | England | CON | CON |
| 363. Mid Dorset and North Poole | England | LIB | CON |
| 364. Mid Norfolk | England | CON | CON |
| 365. Mid Sussex | England | CON | CON |
| 366. Mid Ulster | Northern Ireland | SF | SF |
| 367. Mid Worcestershire | England | CON | CON |
| 368. Middlesbrough | England | LAB | LAB |
| 369. Middlesbrough South and East Cleveland | England | LAB | LAB |
| 370. Midlothian | Scotland | LAB | SNP |
| 371. Milton Keynes North | England | CON | CON |
| 372. Milton Keynes South | England | CON | CON |
| 373. Mitcham and Morden | England | LAB | LAB |
| 374. Mole Valley | England | CON | CON |
| 375. Monmouth | Wales | CON | CON |
| 376. Montgomeryshire | Wales | CON | CON |
| 377. Moray | Scotland | SNP | SNP |
| 378. Morecambe and Lunesdale | England | CON | LAB |
| 379. Morley and Outwood | England | LAB | LAB |
| 380. Motherwell and Wishaw | Scotland | LAB | SNP |
| 381. Na h-Eileanan an Iar (Western Isles) | Scotland | SNP | SNP |
| 382. Neath | Wales | LAB | LAB |
| 383. New Forest East | England | CON | CON |
| 384. New Forest West | England | CON | CON |
| 385. Newark | England | CON | CON |
| 386. Newbury | England | CON | CON |
| 387. Newcastle upon Tyne Central | England | LAB | LAB |
| 388. Newcastle upon Tyne East | England | LAB | LAB |
| 389. Newcastle upon Tyne North | England | LAB | LAB |
| 390. Newcastle-under-Lyme | England | LAB | LAB |
| 391. Newport East | Wales | LAB | LAB |
| 392. Newport West | Wales | LAB | LAB |
| 393. Newry and Armagh | Northern Ireland | SF | SF |
| 394. Newton Abbot | England | CON | CON |
| 395. Normanton, Pontefract and Castleford | England | LAB | LAB |
| 396. North Antrim | Northern Ireland | DUP | DUP |
| 397. North Ayrshire and Arran | Scotland | LAB | SNP |
| 398. North Cornwall | England | LIB | LIB |
| 399. North Devon | England | LIB | CON |
| 400. North Dorset | England | CON | CON |
| 401. North Down | Northern Ireland | OTH | Other |
| 402. North Durham | England | LAB | LAB |
| 403. North East Bedfordshire | England | CON | CON |
| 404. North East Cambridgeshire | England | CON | CON |
| 405. North East Derbyshire | England | LAB | LAB |
| 406. North East Fife | Scotland | LIB | SNP |
| 407. North East Hampshire | England | CON | CON |
| 408. North East Hertfordshire | England | CON | CON |
| 409. North East Somerset | England | CON | CON |
| 410. North Herefordshire | England | CON | CON |
| 411. North Norfolk | England | LIB | LIB |
| 412. North Shropshire | England | CON | CON |
| 413. North Somerset | England | CON | CON |
| 414. North Swindon | England | CON | CON |
| 415. North Thanet | England | CON | CON |
| 416. North Tyneside | England | LAB | LAB |
| 417. North Warwickshire | England | CON | LAB |
| 418. North West Cambridgeshire | England | CON | CON |
| 419. North West Durham | England | LAB | LAB |
| 420. North West Hampshire | England | CON | CON |
| 421. North West Leicestershire | England | CON | CON |
| 422. North West Norfolk | England | CON | CON |
| 423. North Wiltshire | England | CON | CON |
| 424. Northampton North | England | CON | CON |
| 425. Northampton South | England | CON | CON |
| 426. Norwich North | England | CON | CON |
| 427. Norwich South | England | LIB | LAB |
| 428. Nottingham East | England | LAB | LAB |
| 429. Nottingham North | England | LAB | LAB |
| 430. Nottingham South | England | LAB | LAB |
| 431. Nuneaton | England | CON | LAB |
| 432. Ochil and South Perthshire | Scotland | LAB | SNP |
| 433. Ogmore | Wales | LAB | LAB |
| 434. Old Bexley and Sidcup | England | CON | CON |
| 435. Oldham East and Saddleworth | England | LAB | LAB |
| 436. Oldham West and Royton | England | LAB | LAB |
| 437. Orkney and Shetland | Scotland | LIB | LIB |
| 438. Orpington | England | CON | CON |
| 439. Oxford East | England | LAB | LAB |
| 440. Oxford West and Abingdon | England | CON | CON |
| 441. Paisley and Renfrewshire North | Scotland | LAB | SNP |
| 442. Paisley and Renfrewshire South | Scotland | LAB | SNP |
| 443. Pendle | England | CON | CON |
| 444. Penistone and Stocksbridge | England | LAB | LAB |
| 445. Penrith and The Border | England | CON | CON |
| 446. Perth and North Perthshire | Scotland | SNP | SNP |
| 447. Peterborough | England | CON | CON |
| 448. Plymouth, Moor View | England | LAB | LAB |
| 449. Plymouth, Sutton and Devonport | England | CON | LAB |
| 450. Pontypridd | Wales | LAB | LAB |
| 451. Poole | England | CON | CON |
| 452. Poplar and Limehouse | England | LAB | LAB |
| 453. Portsmouth North | England | CON | CON |
| 454. Portsmouth South | England | LIB | CON |
| 455. Preseli Pembrokeshire | Wales | CON | CON |
| 456. Preston | England | LAB | LAB |
| 457. Pudsey | England | CON | CON |
| 458. Putney | England | CON | CON |
| 459. Rayleigh and Wickford | England | CON | CON |
| 460. Reading East | England | CON | CON |
| 461. Reading West | England | CON | CON |
| 462. Redcar | England | LIB | LAB |
| 463. Redditch | England | CON | CON |
| 464. Reigate | England | CON | CON |
| 465. Rhondda | Wales | LAB | LAB |
| 466. Ribble Valley | England | CON | CON |
| 467. Richmond (Yorks) | England | CON | CON |
| 468. Richmond Park | England | CON | CON |
| 469. Rochdale | England | LAB | LAB |
| 470. Rochester and Strood | England | UKP | CON |
| 471. Rochford and Southend East | England | CON | CON |
| 472. Romford | England | CON | CON |
| 473. Romsey and Southampton North | England | CON | CON |
| 474. Ross, Skye and Lochaber | Scotland | LIB | SNP |
| 475. Rossendale and Darwen | England | CON | CON |
| 476. Rother Valley | England | LAB | LAB |
| 477. Rotherham | England | LAB | LAB |
| 478. Rugby | England | CON | CON |
| 479. Ruislip, Northwood and Pinner | England | CON | CON |
| 480. Runnymede and Weybridge | England | CON | CON |
| 481. Rushcliffe | England | CON | CON |
| 482. Rutherglen and Hamilton West | Scotland | LAB | LAB |
| 483. Rutland and Melton | England | CON | CON |
| 484. Saffron Walden | England | CON | CON |
| 485. Salford and Eccles | England | LAB | LAB |
| 486. Salisbury | England | CON | CON |
| 487. Scarborough and Whitby | England | CON | CON |
| 488. Scunthorpe | England | LAB | LAB |
| 489. Sedgefield | England | LAB | LAB |
| 490. Sefton Central | England | LAB | LAB |
| 491. Selby and Ainsty | England | CON | CON |
| 492. Sevenoaks | England | CON | CON |
| 493. Sheffield Central | England | LAB | LAB |
| 494. Sheffield South East | England | LAB | LAB |
| 495. Sheffield, Brightside and Hillsborough | England | LAB | LAB |
| 496. Sheffield, Hallam | England | LIB | LIB |
| 497. Sheffield, Heeley | England | LAB | LAB |
| 498. Sherwood | England | CON | LAB |
| 499. Shipley | England | CON | CON |
| 500. Shrewsbury and Atcham | England | CON | CON |
| 501. Sittingbourne and Sheppey | England | CON | CON |
| 502. Skipton and Ripon | England | CON | CON |
| 503. Sleaford and North Hykeham | England | CON | CON |
| 504. Slough | England | LAB | LAB |
| 505. Solihull | England | LIB | CON |
| 506. Somerton and Frome | England | LIB | CON |
| 507. South Antrim | Northern Ireland | DUP | DUP |
| 508. South Basildon and East Thurrock | England | CON | CON |
| 509. South Cambridgeshire | England | CON | CON |
| 510. South Derbyshire | England | CON | CON |
| 511. South Dorset | England | CON | CON |
| 512. South Down | Northern Ireland | SDLP | SDLP |
| 513. South East Cambridgeshire | England | CON | CON |
| 514. South East Cornwall | England | CON | CON |
| 515. South Holland and The Deepings | England | CON | CON |
| 516. South Leicestershire | England | CON | CON |
| 517. South Norfolk | England | CON | CON |
| 518. South Northamptonshire | England | CON | CON |
| 519. South Ribble | England | CON | CON |
| 520. South Shields | England | LAB | LAB |
| 521. South Staffordshire | England | CON | CON |
| 522. South Suffolk | England | CON | CON |
| 523. South Swindon | England | CON | CON |
| 524. South Thanet | England | CON | UKP |
| 525. South West Bedfordshire | England | CON | CON |
| 526. South West Devon | England | CON | CON |
| 527. South West Hertfordshire | England | CON | CON |
| 528. South West Norfolk | England | CON | CON |
| 529. South West Surrey | England | CON | CON |
| 530. South West Wiltshire | England | CON | CON |
| 531. Southampton, Itchen | England | LAB | LAB |
| 532. Southampton, Test | England | LAB | LAB |
| 533. Southend West | England | CON | CON |
| 534. Southport | England | LIB | LIB |
| 535. Spelthorne | England | CON | CON |
| 536. St Albans | England | CON | CON |
| 537. St Austell and Newquay | England | LIB | CON |
| 538. St Helens North | England | LAB | LAB |
| 539. St Helens South and Whiston | England | LAB | LAB |
| 540. St Ives | England | LIB | LIB |
| 541. Stafford | England | CON | CON |
| 542. Staffordshire Moorlands | England | CON | CON |
| 543. Stalybridge and Hyde | England | LAB | LAB |
| 544. Stevenage | England | CON | CON |
| 545. Stirling | Scotland | LAB | SNP |
| 546. Stockport | England | LAB | LAB |
| 547. Stockton North | England | LAB | LAB |
| 548. Stockton South | England | CON | LAB |
| 549. Stoke-on-Trent Central | England | LAB | LAB |
| 550. Stoke-on-Trent North | England | LAB | LAB |
| 551. Stoke-on-Trent South | England | LAB | LAB |
| 552. Stone | England | CON | CON |
| 553. Stourbridge | England | CON | CON |
| 554. Strangford | Northern Ireland | DUP | DUP |
| 555. Stratford-on-Avon | England | CON | CON |
| 556. Streatham | England | LAB | LAB |
| 557. Stretford and Urmston | England | LAB | LAB |
| 558. Stroud | England | CON | LAB |
| 559. Suffolk Coastal | England | CON | CON |
| 560. Sunderland Central | England | LAB | LAB |
| 561. Surrey Heath | England | CON | CON |
| 562. Sutton and Cheam | England | LIB | LIB |
| 563. Sutton Coldfield | England | CON | CON |
| 564. Swansea East | Wales | LAB | LAB |
| 565. Swansea West | Wales | LAB | LAB |
| 566. Tamworth | England | CON | CON |
| 567. Tatton | England | CON | CON |
| 568. Taunton Deane | England | LIB | CON |
| 569. Telford | England | LAB | LAB |
| 570. Tewkesbury | England | CON | CON |
| 571. Thirsk and Malton | England | CON | CON |
| 572. Thornbury and Yate | England | LIB | LIB |
| 573. Thurrock | England | CON | UKP |
| 574. Tiverton and Honiton | England | CON | CON |
| 575. Tonbridge and Malling | England | CON | CON |
| 576. Tooting | England | LAB | LAB |
| 577. Torbay | England | LIB | CON |
| 578. Torfaen | Wales | LAB | LAB |
| 579. Torridge and West Devon | England | CON | CON |
| 580. Totnes | England | CON | CON |
| 581. Tottenham | England | LAB | LAB |
| 582. Truro and Falmouth | England | CON | CON |
| 583. Tunbridge Wells | England | CON | CON |
| 584. Twickenham | England | LIB | LIB |
| 585. Tynemouth | England | LAB | LAB |
| 586. Upper Bann | Northern Ireland | DUP | DUP |
| 587. Uxbridge and South Ruislip | England | CON | CON |
| 588. Vale of Clwyd | Wales | LAB | LAB |
| 589. Vale of Glamorgan | Wales | CON | CON |
| 590. Vauxhall | England | LAB | LAB |
| 591. Wakefield | England | LAB | LAB |
| 592. Wallasey | England | LAB | LAB |
| 593. Walsall North | England | LAB | LAB |
| 594. Walsall South | England | LAB | LAB |
| 595. Walthamstow | England | LAB | LAB |
| 596. Wansbeck | England | LAB | LAB |
| 597. Wantage | England | CON | CON |
| 598. Warley | England | LAB | LAB |
| 599. Warrington North | England | LAB | LAB |
| 600. Warrington South | England | CON | LAB |
| 601. Warwick and Leamington | England | CON | CON |
| 602. Washington and Sunderland West | England | LAB | LAB |
| 603. Watford | England | CON | CON |
| 604. Waveney | England | CON | LAB |
| 605. Wealden | England | CON | CON |
| 606. Weaver Vale | England | CON | LAB |
| 607. Wellingborough | England | CON | CON |
| 608. Wells | England | LIB | CON |
| 609. Welwyn Hatfield | England | CON | CON |
| 610. Wentworth and Dearne | England | LAB | LAB |
| 611. West Aberdeenshire and Kincardine | Scotland | LIB | SNP |
| 612. West Bromwich East | England | LAB | LAB |
| 613. West Bromwich West | England | LAB | LAB |
| 614. West Dorset | England | CON | CON |
| 615. West Dunbartonshire | Scotland | LAB | SNP |
| 616. West Ham | England | LAB | LAB |
| 617. West Lancashire | England | LAB | LAB |
| 618. West Suffolk | England | CON | CON |
| 619. West Tyrone | Northern Ireland | SF | SF |
| 620. West Worcestershire | England | CON | CON |
| 621. Westminster North | England | LAB | LAB |
| 622. Westmorland and Lonsdale | England | LIB | LIB |
| 623. Weston-Super-Mare | England | CON | CON |
| 624. Wigan | England | LAB | LAB |
| 625. Wimbledon | England | CON | CON |
| 626. Winchester | England | CON | CON |
| 627. Windsor | England | CON | CON |
| 628. Wirral South | England | LAB | LAB |
| 629. Wirral West | England | CON | LAB |
| 630. Witham | England | CON | CON |
| 631. Witney | England | CON | CON |
| 632. Woking | England | CON | CON |
| 633. Wokingham | England | CON | CON |
| 634. Wolverhampton North East | England | LAB | LAB |
| 635. Wolverhampton South East | England | LAB | LAB |
| 636. Wolverhampton South West | England | CON | LAB |
| 637. Worcester | England | CON | CON |
| 638. Workington | England | LAB | LAB |
| 639. Worsley and Eccles South | England | LAB | LAB |
| 640. Worthing West | England | CON | CON |
| 641. The Wrekin | England | CON | CON |
| 642. Wrexham | Wales | LAB | LAB |
| 643. Wycombe | England | CON | CON |
| 644. Wyre and Preston North | England | CON | CON |
| 645. Wyre Forest | England | CON | CON |
| 646. Wythenshawe and Sale East | England | LAB | LAB |
| 647. Yeovil | England | LIB | LIB |
| 648. Ynys Môn (Anglesey) | Wales | LAB | LAB |
| 649. York Central | England | LAB | LAB |
| 650. York Outer | England | CON | CON |
*Last win counts most recent winning party for each seat at time of latest election or by-election.