Calling May's plan, also known as the Chequers Plan, a "cheat", Johnson said: "If we cheat the electorate (with the plan), we will escalate the sense of mistrust".
Stanley, an author and former politician, supported the vote to Remain, but said that he doesn't want another referendum because the people have spoken, but he also displayed a complete lack of knowledge on the Irish border issue.
On Wednesday, she was keen to show she was in charge of the Brexit talks.
"If we don't - if we all go off in different directions in pursuit of our own visions of the ideal Brexit - we risk ending up with no Brexit at all". And May and the other Conservatives, I think they know they need to stick together.
May has had a tough year since a disastrous 2017 conference speech, when she was her plagued by a cough and interrupted by a prankster while parts of the backdrop fell down as she was speaking.
She reached out to voters whose living standards have been squeezed by stagnating incomes and public-spending cuts since the 2008 global financial crisis.
"Leaving aside whether Mr Johnson is preparing a leadership bid or has passed his political sell-by date, as some of his erstwhile colleagues suggest, his speech showed why his party needs him in a front-line role", it said.
It clearly mocked May, who once said the naughtiest thing she had done was run through a field of wheat. Forty-eight lawmakers would be needed to trigger a vote of confidence. The Echo contacted Mr Duddridge for comment but he did not reply before the paper went to print.
The challenges that May is facingdid little to dampen the gusto of her speech to conservatives Wednesday.
She defended her Chequers plan once again, saying it is one that "delivers on the vote of the British people", she said, adding that "it means we take back control of our money, our borders and our laws".
May and her team are braced for a gruelling set of discussions: with EU leaders, with her parliamentary partners in the DUP, and with the European Commission, all the while withstanding ferocious friendly fire. "Now politicians should support her to get a deal - and the critical withdrawal agreement - over the line".
Sitting in the front row was former Brexit Secretary David Davis who, along with Johnson, resigned hours after May unveiled her Brexit blueprint after a ministerial meeting at Chequers, her country house retreat.
"It is no surprise that we have had a range of different views expressed this week", she said.
The Prime Minister referred to the National Health Service 14 times, compared with 11 direct mentions of Brexit.
Johnson said if the right deal with Brussels was agreed it could be win-win for both sides of the Channel.
So, a deal by December - during a summit on 13 and 14 - is seen as the last chance for an agreement to be reached, as it will take at least three months for each of the European Union member countries to ratify it in time for the deadline in March.
'May is as stubborn as a mule, ' a French diplomatic source said, casting doubt on whether the British premier could even muster a parliamentary majority to approve any eventual deal.
Numerous eurosceptic Conservative MPs have already drawn big crowds in Birmingham as they offer their own idea for a looser trade arrangement with the EU.
At home it will not be any easier.
Brussels insists the Brexit divorce deal must include a legally-binding "backstop" to prohibit a restored "hard border" between the British province of Northern Ireland, and the Irish Republic, which will remain an European Union member.
"So this is our proposal". No taking Britain back to square one. Good for jobs, good for the Union. It delivers on the referendum.