But former Conservative leader and Brexiteer Lord Howard told Today: "The prime minister has made a series of promises, the prime minister has repeatedly said that we must regain control of our laws, our money and our borders".
Mr Rees-Mogg's intervention sparked a backlash from his own colleagues.
British Prime Minister Theresa May held talks Tuesday with her Dutch counterpart in a crunch week when she is due to thrash out with ministers the shape of trade ties with the European Union after Brexit.
But Dr Lee said: "We need courageous, rational leadership to get our country successfully through Brexit", with "decisions based on reality and evidence, not dreams and dogma".
May will gather her fractious Conservative Cabinet on Friday to try to hammer out a plan for customs and trade ties.
"Whatever your position, I hope we can all agree that Jacob Rees Mogg is a principled and dedicated MP who wants the best for our country".
The Chequers summit is aimed at fixing the Government's position on key areas of the trade deal it wants with Brussels, but details remain vague on a reported "third way" to manage customs arrangements at ports and the Irish border.
She will ask her cabinet to back a plan that would see Britain collect duties on imports at the rate of the EU's common customs tariff, in effect making Britain the EU's tax collector, according to Peston.
Senior lawmaker warns prime minister to deliver on Brexit DANICA KIRKA Britain's Prime Minister Theresa May during celebrations marking National Armed Forces Day in Llandudno, Wales, Saturday June 30, 2018.
However, the signs that the government is starting from scratch - almost one year after customs plans were first published and just four days before the Chequers showdown - "are certain to add to criticism of Brexit chaos" says The Independent.
Dutch Prime Minister Mark Rutte again called for urgent "clarity" on future ties at a meeting in the Netherlands on Tuesday, where May made the case for "an ambitious economic and seucirty partnership" with the European Union, her office said.
"We are now looking forward to the White Paper from the United Kingdom, and we very much hope that it will bring the necessary clarity, realism, and impetus to these negotiations", Tusk told MEPs.
In Strasbourg, Mr Tusk told MEPs: "The sooner we get a precise United Kingdom proposal on the Irish border, the better the chance to finalise the Brexit negotiations this year".