Boris Johnson and other leading Tory Brexiteers have attacked Theresa May's Brexit plan at an event putting the economic case for leaving the EU without an agreement on trade.
The Economists For Free Trade report said the UK had "nothing to fear" from a "clean break" from the EU and using World Trade Organisation rules which could give an £80bn boost to the tax base and cut prices by 8%, it said.
But the claims were branded "Project Fantasy" by Labour MP Chuka Umunna.
And Chancellor Philip Hammond said the economic assumptions behind the analysis were "not sustainable" and out of line with other forecasts.
Mr Hammond, who earlier on Tuesday announced Bank of England Governor Mark Carney would be extending his contract until January 2020 to provide continuity after Brexit, has issued a fresh warning of "some turbulence" if the UK left the EU in March without a deal. Ministers have said reaching a general agreement on future economic co-operation with the EU is in the UK's interests before it leaves on 29 March, 2019.
It also emerged that Boris Johnson and his wife, Marina Wheeler, who is half Indian, have announced they are divorcing, news that highlights a unique tension at the heart of the former foreign secretary’s career: that he has an unusually vivid personal life for a Conservative MP, and that his political fortunes remain largely unharmed.
Johnson and Wheeler, a senior lawyer, both 54, have been married for 25 years. They made the announcement in a joint statement after a story appeared in the Sun on Friday detailing claims that Johnson had recently been unfaithful.
