Labour candidate Kate Hoey's politics are so right wing UKIP leader Paul Nuttall is encouraging his party's supporters to vote for her.
UKIP have stood aside in Vauxhall in the hope it will help one of the main campaigners for Brexit retain her seat in a constituency that overwhelmingly backed Remain in the EU referendum.
Ms Hoey campaigned for a Leave vote alongside then UKIP leader Nigel Farage. This puts her totally out of tune with the majority of her constituents, after 78.6% of voters in Lambeth voted to stay in the EU.
Asked on the BBC's Daily Politics whether UKIP is encouraging people to vote Conservative, the party's leader said: "We're also telling people in certain seats like Kate Hoey's to go out and vote Labour.
"These are people who are true and real Brexiteers. They are specific seats with specific sitting MPs whereby we will stand aside to ensure we get the Brexit that we want."
If you vote Labour, you will get UKIP in Vauxhall
George Turner, the Liberal Democrat candidate to be Vauxhall's next MP, is standing on a pro European platform.
He has already been endorsed by Lambeth For Europe as the best candidate to take on Ms Hoey and truly represent Vauxhall's voters.