With the House of Lords due to begin debating the Government’s proposed Article 50 Bill next week, the Change Britain group are calling on British voters to ramp up the pressure on peers.
Opposition members have already tabled a number of amendments to the Article 50 legislation raising fears the Prime Minister’s Brexit timetable could be delayed.
If passed, the Article 50 Bill will hand Theresa May the power to formally notify the EU of Britain’s departure, which she has vowed to do by the end of next month.
Both Labour and the Liberal Democrats have already revealed they will seek to meddle with the Government’s Bill in the House of Lords, having failed in a bid to add conditions to the legislation in the House of Commons last week.
The Government does not hold a majority in the House of Lords, meaning the Bill’s passage is likely to prove more complicated when debated by unelected peers.
But Change Britain have launched a campaign for peers to be shown the strength of public support for the Government to be allowed to get on with Brexit unencumbered.
They have highlighted how peers previously blocked an attempt to get the promise of an EU referendum written into law in 2014.
More than 50,000 emails have already been sent to a trio of leading europhile peers, including former Labour leader Lord Neil Kinnock and ex-business secretary Lord Peter Mandelson demanding they vote for the Article 50 Bill unamended.
The peers, along with former BBC Trust chair Lord Chris Patten, are also being urged to reveal their EU pensions if they speak in the House of Lords next week.
All three previously served as EU commissioners and are estimated to earn tens of thousands each year in pension payments from their Brussels service.
EU pension holders are required to hold a "duty of loyalty" to the bloc.
Lord Mandelson and Lord Kinnock are being urged to declare their EU pensions in the House of Lords
Unelected peers shouldn’t seek to delay this because they refuse to accept the result of the referendum.
Tory MP Anne-Marie Trevelyan
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Tory MP and Change Britain supporter Anne-Marie Trevelyan said: “This Bill is simply about giving the Prime Minister the authority to trigger Article 50 and begin the process of leaving the EU.
“Nothing more, nothing less. Unelected peers shouldn’t seek to delay this because they refuse to accept the result of the referendum.
“Many of these Lords are also set to receive generous pensions from the EU.
“They should declare this so the public know whether they are voting with democracy or their bank account in mind.”
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Continued cooperation with the EU to tackle terrorism and international crime.
Earlier this month, leading Remain campaigner Lord Mandelson was handed France’s top honour for services to the EU.
Prior to the EU referendum, Lord Patten described the Brexit campaign as “sour, xenophobic English nationalism”.
Lord Kinnock has warned an EU exit deal could take a decade to negotiate while he has claimed the Leave result was won through “falsehood and prejudice”.
Brexit Secretary David Davis has told peers to do their “patriotic duty” and pass the Article 50 Bill unamended, although Downing Street has backed away from threats the House of Lords could be abolished if it doesn’t support the legislation.