Mayor Boris Johnson has been selected as the Tory candidate for Uxbridge and South Ruislip in the 2015 general election.
At the last election the Tories held the seat with a 11,216 majority, almost guaranteeing the Mayor’s return to parliament.
Mr Johnson was previously MP for Henley from 2001 until 2008 when he stepped down following his election as Mayor.
His Mayoral term is due to finish in 2016 meaning he’ll serve an overlapping year at City Hall and the Commons.
Mr Johnson announced his intention to stand for selection for the seat in August.
Opponents say his need to campaign between now and the general election will reduce him to a “part-time Mayor” who lacks focus on Londoners’ needs.
However Mr Johnson’s team insist he’ll use his seat in the Commons to make the case for further powers for London, including greater fiscal autonomy.
The Mayor was one of three candidates seeking the seat and won the ballot of local party members on the first round of voting.
Speaking after the result was announced, he said: “It will be a tough fight, it will be a long fight, but I have no doubt whatever that we are going to be able to return David Cameron and the Conservatives with an absolute majority in 2015.”
Len Duvall, Labour’s leader on the London Assembly said: “Boris has admitted that he only became Mayor to ‘show what he could do’, but in reality he is set to leave behind a disappointing legacy, having failed to resolve any of London’s major problems during his time as Mayor.
“With a chronic housing crisis, reduced police numbers and London A&E units under threat, there is a lot the Mayor of London should be focusing on in his remaining two years in office.
“Running for Parliament and positioning himself for a potential Conservative leadership challenge are not on that list.”