Boris Johnson has been challenged to resign as the UK’s Foreign Secretary “on a point of principle” over Heathrow’s third runway by one of his fellow Conservative MPs.
Senior backbencher Sarah Wollaston said that allowing Mr Johnson, a long-term critic of the expansion – to travel abroad to allow him to avoid a three-line whip in favour of the scheme “won’t wash”.
She challenged the former London mayor to “put his money where his mouth is” and stand down, 24 hours ahead of a vote that is likely to expose splits in both Conservative and Labour ranks.
The spotlight will be on the whereabouts of Boris Johnson before and during Monday’s Commons vote on whether to increase capacity at Europe’s busiest airport.
Speaking to the BBC’s Westminster Hour on Sunday, Totnes MP Dr Wollaston pointed out that Greg Hands last week resigned as international trade minister to vote against the Heathrow whip.
She said: “I think this would be an opportunity for a colleague like Boris Johnson to actually put his money where his mouth is.”
The resignation of Chelsea and Fulham MP Mr Hands put pressure on Mr Johnson, who once threatened to lie down in front of the bulldozers if the third runway was approved.
But Mrs May last week confirmed he would miss the vote by being “the living embodiment of global Britain” abroad.
Meanwhile, more than 40 Labour MPs have said they will disregard their frontbench and support a third runway at Heathrow.
The group whose constituencies span the country put their names to a letter to colleagues in the party urging them to support a project they say could create 180,000 jobs across the UK.
— yourHeathrow (@yourHeathrow) June 24, 2018
Labour is officially opposed to the expansion but Jeremy Corbyn has allowed MPs a free vote on a measure that is supported by trade unions.
The number of opposition MPs prepared to vote for Heathrow suggests the Commons vote on Monday night should pass with some ease.
Those who have signed the letter include many critics of the party leadership, including Luciana Berger, John Mann, Mike Gapes and Wes Streeting.
They wrote that supporting the scheme is right “in principle”, saying: “It’ll create up to 180,000 new jobs across the country, delivering growth and connectivity for our constituents.”
“As this project will span multiple parliaments – including, we hope, a Labour government – it’s our responsibility to secure strong cross-party backing for this project.”
Labour has previously said that the expansion plan failed to meet its four tests for support: increased capacity, C02 reduction, minimised noise and shared benefits across the UK.
But the MPs disagreed, writing: “Monday night’s vote is not a blank cheque – the huge benefits from expansion can only be achieved if Heathrow also meets stringent tests on air quality and noise.
“We will work to ensure legally binding safeguards are in place that will mean a new runway can only be built if it is environmentally sustainable.”
Ahead of the vote, officials said the expansion of Heathrow would create 114,000 extra jobs in the area around the airport by 2030, with an extra 16 million long-haul seats by 2040.
It would represent the first full-length runway in the south east since the Second World War, the Department for Transport said.
Opponents have attacked the scheme on environmental, noise and financial grounds grounds, with Friends of the Earth saying it was “morally reprehensible” and would see the enlarged Heathrow emitting as much carbon as the whole of Portugal.