Closest seats at the 1987 general election

The smallest winning majorities in UK general elections since 1918, in votes and as a share of the vote.

#	Constituency	Winner	Runner-up	Majority	%
1	Mansfield	Lab	Con	56	0.11
2	Brecon and Radnor	Alliance	Con	56	0.13
3	York	Con	Lab	147	0.24
4	Dulwich	Con	Lab	180	0.46
5	Ayr	Con	Lab	182	0.34
6	Wolverhampton North East	Con	Lab	204	0.43
7	Portsmouth South	Con	Alliance	205	0.38
8	Wallasey	Con	Lab	279	0.52
9	Bradford South	Lab	Con	309	0.60
10	Norwich South	Lab	Con	336	0.65
11	Dewsbury	Lab	Con	445	0.80
12	Nottingham East	Con	Lab	456	0.97
13	Glanford and Scunthorpe	Lab	Con	512	0.90
14	Thurrock	Con	Lab	690	1.43
15	Down South	SDLP	UUP	731	1.29
16	Stockton South	Con	Alliance	774	1.30
17	Islington South and Finsbury	Lab	Alliance	805	1.95
18	Bolton North East	Con	Lab	813	1.74
19	Blyth Valley	Lab	Alliance	853	1.85
20	Battersea	Con	Lab	857	1.81
21	Ipswich	Con	Lab	874	1.66
22	Carlisle	Lab	Con	916	2.11
23	Stirling	Con	Lab	948	2.06
24	West Bromwich East	Lab	Con	983	2.31
25	Dundee East	Lab	SNP	1,015	2.20
26	Clwyd South West	Lab	Con	1,028	2.18
27	Crewe and Nantwich	Lab	Con	1,092	1.89
28	Walsall South	Lab	Con	1,116	2.22
29	Aberdeen South	Lab	Con	1,198	2.84
30	Leicester West	Lab	Con	1,201	2.41
31	Halifax	Lab	Con	1,212	2.13
32	Delyn	Con	Lab	1,224	2.33
33	Edinburgh West	Con	Alliance	1,234	2.50
34	Oxford East	Lab	Con	1,288	2.62
35	Lancashire West	Con	Lab	1,353	2.23
36	Batley and Spen	Con	Lab	1,362	2.32
37	Argyll and Bute	Alliance	Con	1,394	3.79
38	Bristol South	Lab	Con	1,404	2.76
39	Bath	Con	Alliance	1,412	2.73
40	Hereford	Con	Alliance	1,413	2.70
41	Cambridgeshire North East	Con	Alliance	1,428	2.49
42	Tooting	Lab	Con	1,441	2.97
43	Fife North East	Alliance	Con	1,447	3.63
44	Wrekin The	Lab	Con	1,456	2.25
45	Walthamstow	Con	Lab	1,512	4.29
46	Derby South	Lab	Con	1,516	3.15
47	Angus East	SNP	Con	1,544	3.35
48	Bradford North	Lab	Con	1,633	3.33
49	Brent East	Lab	Con	1,653	4.20
50	Nottingham North	Lab	Con	1,665	3.29

Single-member seats with a recorded contest. Percentages are of valid votes.

Official results House of Commons Library and UK Parliament election results data. Contains Parliamentary information licensed under the Open Parliament Licence v3.0. How we use this data