Boris Johnson says Vote Leave’s Brexit campaign bus £350million-a-week vow should have been £438million

BORIS Johnson’s Brexit vow of clawing back £350million a week from the EU should have been £438million, he says.

The Foreign Secretary claimed: “We grossly underestimated the sum over which we would be able to take back control.”

He said the UK’s weekly gross contribution will continue to rise - and will stand at £438m per week the end of a likely post-Brexit transition period in 2020-21.

Critics slammed Vote Leave’s Brexit battle bus claim that we would get back the cash - but Boris insisted campaigners were right to pledge it would go to the NHS.

Johnson told the Guardian: “There was an error on the side of the bus. We grossly underestimated the sum over which we would be able to take back control."

He added: “As and when the cash becomes available – and it won’t until we leave – the NHS should be at the very top of the list.”

And the Foreign Secretary insisted that we should NOT have a second referendum - because the people don't want it.

"We’ve just had one, and I think it went pretty well but it was something that caused an awful lot of heartache and soul-searching, and everybody went through the wringer on it,” he said.

"I’m not convinced that the public is absolutely gagging for another Brexit referendum."

But if there ever is one, he said Leave would win it again hands down.