British general elections through the years - in pictures
A mother casting her vote in the British general election as her baby looks on, at a polling station in Dulwich, south London, in 1923. All photos: Getty Images
Ballot boxes arrive at Caxton Hall in Westminster during the general election of 1935
Officials prepare ballot boxes to be distributed to polling booths in London in 1950
Workmen bring out polling booth partitions to be transported to voting stations in London in 1951
A large crowd gathers in Piccadilly Circus for the 1951 general election result
People watch the results coming in and listen to a live band at a general election party at the Savoy Hotel, London, in 1955
Ballot boxes are emptied for counting at St Pancras Town Hall in London in 1959
ITN and ITV broadcasters prepare for a dummy run of the networked news coverage of the 1959 general election at Television House in London
Hardy bathers celebrating the results of the 1966 general election in one of Trafalgar Square's fountains in London
BBC commentators at London Television Centre preparing for the 1966 general election broadcast
A 1970 general election scoreboard at the Dorchester Hotel in London
Election workers updating a general election chart at Labour Party headquarters in London in 1970
Three nuns from the Franciscan Mission of Mercy entering a polling station in Kensington to vote in the 1974 general election
A Conservative Party campaign poster designed by the Saatchi & Saatchi advertising agency for the 1979 general election
Supporters outside the Conservative Party's headquarters in London on election night in 1987
The Conservative Party election campaign bus in London in 1997
An exit poll conducted by the BBC is projected on to Big Ben in London at the moment voting finished in 2010
Police officers restrain a demonstrator during a protest at Parliament Square on election day in 2015
A woman rests as she waits for ballot papers to arrive at the Middlesbrough South and East Cleveland count in 2015 in Redcar
A polling station inside a launderette in Oxford in 2015
Guia the Labrador waits outside a polling station in Stalybridge, north-west England, in 2017