Mr Johnson announced that if Tasmina Ahmed-Sheikh, MP for Ochil and South Perthshire, spent more time studying the PM’s speeches, she would know Mrs May’s plan is to end the EU’s legal supremacy and secure the best deal for Britain.
The SNP MP had asked Mr Johnson why it appeared “everyone” knew more about the Government’s plans for leaving the European Union than the elected representatives of the people.
Ms Ahmed-Sheikh said in the Commons on Tuesday: “At the weekend the Prime Minister stated she intended to update Chancellor [Angela] Merkel on where we are with our Brexit preparations.
“Can I therefore ask the Foreign Secretary if he can let people across this house know why is it the case that everybody knows more about the Government’s plans than the elected representatives in this house, than the people across the United Kingdom and indeed businesses in our constituencies who need and want to plan for the future.”
The SNP member’s attack on the Foreign Secretary was sparked after it emerged he had told a Czech newspaper Britain was leaving the EU’s customs union and that the idea free movement is a founding pillar of the EU is “b******”.
And according to the paper, Mr Johnson had insisted the UK could still keep full access to the internal market, despite leaving.
[Ms Ahmed-Sheikh] should study more closely the speeches of the Prime Minister
Mr Johnson said: “The best advice I can give to the honourable lady is that she should study more closely the speeches of the Prime Minister who has set out very clearly that the UK will not be governed by EU law and that we will get the best possible deal in trade, in goods and services for the benefit, not just of this country, but for the rest of the EU.”
The Cabinet minister also insisted the Tories were united behind the PM’s aim to get the best possible deal from the Brexit negotiations.
“I can tell you, all of these benches are united behind the Prime Minister in achieving that aim,” he said.
Despite declaring Mrs May’s party united, Mr Johnson dodged questions on whether the Government could seek an interim exit arrangement.
Labour MP Emma Reynolds asked Mr Johnson to confirm that the Government is looking at a “transitional deal” between the end of Article 50 negotiations, likely to be in 2019, and a full bilateral deal with the European Union.
Mr Johnson replied: “I don’t want to accuse you of unnecessary pessimism but I have no doubt whatever that… this country can achieve exactly what the Prime Minister has set out, which is the best possible deal in trade, goods, services, and it’ll be win-win for both the UK and the EU.”
In October Mrs May hailed Britain’s deal with Nissan – which will see it use its Sunderland plant to build its latest range of vehicles – as fantastic news for the UK.