Nigel Farage has said the claim of the Vote Leave campaign that £350m a week gets sent to the EU which could be spent on the NHS was a "mistake".
Speaking on ITV's Good Morning Britain, the Ukip leader said: "I think they made mistake in doing that."
The campaign slogan, which was painted on the official Leave campaign battle bus, was widely criticised as misleading, as it failed to take into account the rebate Britain gets from EU membership.
A petition calling for a second EU referendum is proving so popular that the website has crashed.
People are invited to share alleged racism or xenophobia stories after Brexit vote to highlight "need for a plan to tackle" social effects.
Time for Project Let's-Make-the-Best-of-it.