The Staggers 6 May 2016 Now that Sadiq Khan is London's new mayor, what will happen in the Tooting by-election? There will be a by-election in the new mayor's south London seat. Getty Sign UpGet the New Statesman's Morning Call email. Sign-up Sadiq Khan comfortably defeated Zac Goldsmith in the London mayoral election, which means (at least) two (quite) interesting things are happening: 1) Sadiq Khan is going to be in City Hall for the next four years, and 2) there is going to be a by-election in Tooting. Unlike the two parliamentary by-elections in Ogmore and Sheffield that Labour won at a canter last night, the south London seat of Tooting is a genuine marginal. The Conservatives have had designs on the seat since at least 2010, when the infamous ‘Tatler Tory’, Mark Clarke, was the party’s candidate. Last May, Khan narrowly increased his majority over the Tories, winning by almost 3,000 votes with a majority of 5.3 per cent. With high house prices pushing London professionals further out towards the suburbs, the seat is gentrifying, making Conservatives more positive about the prospect of taking the seat off Labour. No government has won a by-election from an opposition party since the Conservative Angela Rumbold won Mitcham and Morden from a Labour-SDP defector in June 1982. In a nice parallel, that seat borders Tooting. Of course, the notion of a Tooting by-election will not come as a shock to local Conservatives, however much hope they invested in a Goldsmith mayoral victory. Unusually, the party’s candidate from the general election, Dan Watkins, an entrepreneur who has lived in the area for 15 years, has continued to campaign in the seat since his defeat, styling himself as the party’s “parliamentary spokesman for Tooting”. It would be a big surprise if Watkins is not re-anointed as the candidate for the by-election. What of the Labour side? For some months, those on the party’s centre-left have worried with varying degrees of sincerity that Ken Livingstone may see the by-election as a route back into Parliament. Having spent the past two weeks muttering conspiratorially about the relationship between early 20th-Century German Jews and Adolf Hitler before having his Labour membership suspended, that possibility no longer exists. Other names talked about include: Rex Osborn, leader of the Labour group on Wandsworth Council; Simon Hogg, who is Osborn’s deputy; Rosena Allin-Khan, an emergency medicine doctor who also deputises for Osborn; Will Martindale, who was Labour’s defeated candidate in Battersea last year; and Jayne Lim, who was shortlisted earlier in the year for the Sheffield Brightside selection and used to practise as a doctor at St George’s hospital in Tooting. Ohter names mentioned are Fleur Anderson, another Wandsworth councillor, and Martin Edobor, a junior doctor and chair of the Young Fabians. Christian Wolmar, a transport campaigner who ran for the Labour mayoral nomination last summer, has publicly thrown his hat into the ring. The weight of opinion in the local party is seen as on Labour's centre-left - the CLP nominated Yvette Cooper for the leadership, with Jeremy Corbyn finishing fourth in the ballot. One thing that any new Labour MP would have to contend with is the boundary review reporting in 2018, which will reduce the number of London constituencies by 5. This means that a new Tooting MP could quickly find themselves pitched in a selection fight for a new constituency with their neighbours Siobhain McDonagh, who currently holds Mitcham and Morden, and/or Chuka Umunna, who is the MP for Streatham. According to the Sunday Times, Labour is planning to hold the by-election as quickly as possible, perhaps even before the EU referendum on June 23rd. It's also worth noting that, as my colleague Anoosh Chakelian reported in March, George Galloway plans to stand as well. › Jeremy Corbyn has defied the odds and embarrassed his critics Henry Zeffman writes about politics and is the winner of the Anthony Howard Award 2015. Subscribe For more great writing from our award-winning journalists subscribe for just £1 per month!