The Brexit Party in London has announced that it will not stand candidates in the 317 seats won by the Conservatives at the 2017 general election.
Party leader Nigel Farage said standing candidates across the country could increase the chances of another EU referendum taking place.
But he said the party would stand against all other parties – and focus on taking seats off Labour.
It had vowed to stand more than 600 candidates. The Commons has 650 seats.
Launched in April, the Brexit Party does not hold any Commons seats – but the party was the clear winner in the UK’s European elections in May.
Prime Minister Boris Johnson welcomed the move, calling it “a recognition that there’s only one way to get Brexit done, and that’s to vote for the Conservatives”.