The 1966 UK general election on 31 March 1966 and was called by sitting Labour Prime Minister Harold Wilson. Wilson's decision to call an election turned on the fact that his government, elected only two years previously in 1964 had an unworkable small majority of only 4 MPs. Wilson's hope that he would be returned to office with a larger majority had been encouraged by the government's victory in a by-election in Kingston upon Hull North. In the end the hope was vindicated: the Labour government was returned with a much larger majority of 96.

Results
Headline Swing: 2.70% to Labour

Summary of GB vote (excluding Northern Ireland)
From Conservative to Labour (46 seats): Aberdeen South, Bebington, Bedford, Bedfordshire South, Berwick and East Lothian, Billericay, Birmingham Perry Barr, Bradford West, Brentford and Chiswick, Bristol North East, Bristol North West, Cambridge, Cardiff North, Chislehurst, Conway, Croydon South, Eton and Slough, Exeter, Hampstead, Harrow East, High Peak, Hornchurch, Ilford South, Lancaster, Lewisham North, Lewisham West, Middleton and Prestwich, Monmouth, Norwood, Nottingham South, Oxford, Plymouth Sutton, Portsmouth South, Preston North, Reading, Rugby, Rushcliffe, Sheffield, Heeley, Smethwick, Southampton Test, Stretford, The Wrekin, Uxbridge, Walthamstow East, Yarmouth and York From Conservative to Liberal (4 seats): Aberdeenshire West, Cheadle, Cornwall, North and Roxburgh, Selkirk and Peebles From Labour to Liberal (1 seat): Colne Valley From Liberal to Labour (2 seats): Cardiganshire and Caithness and Sutherland
Televised declarations

MPs elected in the United Kingdom general election, 1966