Mr Davis had been on the brink of resigning a few times in recent weeks, but soldiered on because he did not want to risk bringing the Prime Minister down.
A Brexiteer hailed his resignation as a "principled and fearless decision". Well done David Davis for having the principal and guts to resign.
He said: "We may be on a journey, it may not be a journey however that Theresa May is capable of taking, given her party".
The Prime Minister will be under pressure to make a statement to Parliament on Monday to explain and answer questions on what was agreed. She can not deliver Brexit and our country is at a complete standstill, while the Tories indulge in their leadership tussling.
Airbus chief executive Tom Enders slammed Britain's divided government, saying "Her Majesty's government still has no clue, or at least no consensus, on how to execute Brexit without severe harm".
Under Mrs May's plans Britain would have a "common rulebook" for food, farm and manufactured goods, shadowing European Union regulations and meant to avoid friction at the border.
May unveiled the plan at a closed door government meeting on Friday, siding with those in her divided cabinet who favour closer ties with Europe while ordering those who support a cleaner break to back her policy or quit.
Other backbenchers have backed the aforementioned Jacob Rees-Mogg, with one describing the Somerset MP as "our Churchill".
Appearing on the BBC's The Andrew Marr sShow on Sunday, he said: "I'm a realist and one of the things about politics is you mustn't, you shouldn't, make the ideal the enemy of the good".
Netflix mulling over 'Ultra' subscription for $17 per month
Maybe, this is why they have restricted the test of the new Ultra subscription to a few selected group countries in Europe. Said in an email, "We continuously test new things at Netflix and these tests typically vary in length of time".
His resignation comes days after Theresa May secured the cabinet's backing for her Brexit plan despite claims from Brexiteers that it was too "soft".
The common rulebook for goods, including food and agricultural products, could limit the UK's ability to strike trade deals with countries such as the U.S., for whom securing market access for American farmers would be a big prize for Trump-admiring Brexiteers.
Mr Bridgen said he was "deeply disappointed" with Brexiteer ministers that they "didn't pick up the cudgels and prevent the Cabinet supporting this offer which I think is a huge mistake for our country, for the party, for the Government and for the Prime Minister".
The Prime Minister will have to water down her proposals even further to please Brussels and strike a deal, European leaders and officials believe.
In a tweet earlier today, Mr Coveney said the Government looked forward to the publication of the United Kingdom white paper next week so that the European Union task force can examine the new United Kingdom approach.
The EU's chief Brexit negotiator, Michel Barnier, welcomed the agreement on Friday but added on Twitter: "We will assess proposals to see if they are workable and realistic".
He added: 'The EU has never been keen to facilitate a breaking up of an approach toward the single market in terms of keeping all of the elements of the single market intact and consistent, so I think Britain will find it hard to persuade the EU to support the approach they're now proposing.
Currently Britain is part of the EU's single market - which allows for the frictionless flow of goods and services among the 28 member states - and its tariff-free customs union for goods.
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