The London mayoral election, 2008 for the office of Mayor of London was held on 1 May 2008 and was won by Conservative Party candidate Boris Johnson. It was the third London mayoral election, the previous elections being the first election in May 2000 and the second election in June 2004. The election saw a large 8.8% swing (total votes) from the Labour candidate to the Conservative candidate since the 2004 election, which remains the largest swing between the two major parties in a London mayoral election.