Three former MPs are tipped to make a Commons comeback if Labour manages to grab three London marginals.
Dawn Butler is standing in Brent Central, Joan Ryan in Enfield North and Andrew Dismore in Hendon.
The so-called 'retreads' are all ex-MPs who were defeated in 2010.Butler lost out to Liberal Democrat Sarah Teather who had a majority of 1,345. Teather is not standing.
Ryan held Enfield North from 1997. The seat was won by Conservative Nick de Bois in 2010.
Dismore, a member of the London Assembly, is hoping to recapture Hendon from Tory Matthew Offord.
Hendon, where the Conservatives have a majority of just 106, is at the top of Labour's target list in London.