Closest seats at the 1966 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	Peterborough	Con	Lab	3	0.01
2	Edinburgh Pentlands	Con	Lab	44	0.10
3	Caithness and Sutherland	Lab	Lib	64	0.30
4	Croydon South	Lab	Con	81	0.17
5	South Norfolk	Con	Lab	119	0.31
6	Burton	Con	Lab	277	0.59
7	Holland With Boston	Con	Lab	316	0.60
8	Nottingham South	Lab	Con	316	0.65
9	Plymouth Devonport	Con	Lab	319	0.71
10	Lowestoft	Con	Lab	358	0.68
11	Bedford	Lab	Con	378	0.77
12	Harrow East	Lab	Con	378	0.97
13	Rushcliffe	Lab	Con	380	0.68
14	Rugby	Lab	Con	409	0.94
15	Merton and Morden	Con	Lab	420	1.06
16	Ayr	Con	Lab	484	1.23
17	Maldon	Con	Lab	506	1.02
18	Southend East	Con	Lab	517	1.22
19	Cardigan	Lab	Lib	523	1.72
20	Mitcham	Con	Lab	528	1.00
21	Conway	Lab	Con	581	1.51
22	Croydon North East	Con	Lab	588	1.40
23	Wallasey	Con	Lab	589	1.12
24	Hendon North	Con	Lab	600	1.51
25	Brentford and Chiswick	Lab	Con	607	1.98
26	Hornsey	Con	Lab	615	1.29
27	Manchester Withington	Con	Lab	647	1.67
28	Cheadle	Lib	Con	655	0.86
29	Bristol North West	Lab	Con	669	1.38
30	Cardiff North	Lab	Con	672	1.44
31	Chippenham	Con	Lib	694	1.50
32	Eastleigh	Con	Lab	701	1.31
33	Northwich	Con	Lab	703	1.92
34	North Norfolk	Lab	Con	737	1.80
35	South West Norfolk	Con	Lab	775	2.22
36	Birmingham Selly Oak	Con	Lab	777	2.12
37	Hertford	Con	Lab	794	1.24
38	Yarmouth	Lab	Con	797	1.82
39	Bath	Con	Lab	800	1.78
40	Chislehurst	Lab	Con	810	1.61
41	High Peak	Lab	Con	814	1.98
42	Brighton Kemptown	Lab	Con	831	1.69
43	The Wrekin	Lab	Con	846	1.82
44	Uxbridge	Lab	Con	890	1.86
45	Heston and Isleworth	Con	Lab	926	2.25
46	Cambridge	Lab	Con	991	2.05
47	Colchester	Con	Lab	1,015	1.90
48	Manchester Moss Side	Con	Lab	1,083	3.66
49	North Devon	Lib	Con	1,166	3.02
50	Wembley South	Con	Lab	1,183	3.48

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