Theresa May is on her way home from Paris to face a showdown meeting with senior Tories in a secret location where her critics warned there would be 'blood on the walls'. The Prime Minister will hold talks with members of the executive of the 1922 Committee of backbench Conservative MPs who will threaten to topple her within the next month if she won't 'do her duty' and quit. Brexiteer MP Bob Blackman, who sits on the executive, said today: 'If she doesn't give us a clear timetable, it will be set for her'. Nick Timothy, Mrs May's former chief of staff, said today that it is 'beyond time for the Prime Minister to accept the game is up', adding she 'risks killing the Conservatives for good'. 'Her premiership has failed - her authority is shot. Every day wasted from here makes life harder for whoever leads Britain into the future. We need to end this national humiliation', he said. Mrs May will face the 18-strong 1922 at Westminster but members won't be told the location until an hour before it starts to avoid leaks. Insiders are calling it one of the most important meeting since the Tory committee of backbenchers was formed in 1923 because the party is on the verge of civil war over Brexit. Some Tories want her to stay - claiming it won't solve their Brexit conundrum - with one telling MailOnline: 'Changing the pilot doesn't change the weather'. Theresa May, pictured in Paris with French President Emmanuel Macron last night, will face the 1922 committee of MPs at 11.30am today where she will be told to name the date she is leaving The Prime Minister was in Paris last night for talks with Emmanuel Macron and EU leaders on how to eliminate violent and terrorist content from the internet. Back home she is insisting she won't quit until a Brexit deal is passed - but talks with Labour have hit the buffers as they demand a customs union and ponder making a second referendum the price of any deal. And more than 100 Tory MPs are predicted to vote against the EU Withdrawal Agreement Bill (WAB), which was defeated by 58 votes in March. With the Brexit Party also expected to hammer the Conservatives in the European elections on May 23, there is a clamour for the PM to go to way for a new leader by the summer. Mrs May's Brexit deal could be 'dead' in weeks, Cabinet ministers warned yesterday, as sources claimed that the June vote could be her final act as Prime Minister as grassroots members are planning a vote of no confidence. 1922 Committee treasurer Sir Geoffrey Clifton-Brown said today: 'It would be infinitely preferable if she set a date rather than us force her out. 'It's better that she does it than we have a vote of confidence. What I would like to see is her set out a timetable to trigger a leadership contest.' After the talks with the Prime Minister, the 1922 Committee executive will hold a private meeting where changes to Tory leadership contest rules could be discussed, according to sources. At present, Mrs May cannot be challenged again as leader until December. Tory MP Andrew Bridgen: 'I would like to see the 22 give her a timetable to stand down. And, if she does not accept that timetable, tell her we will have another vote of confidence after the European elections.' Prominent Brexiteer Mark Francois said that a predicted poor Tory showing in next week's European Parliament elections would heap pressure on Mrs May to go. He said: 'As the polls increasingly suggest, we are going to have an extremely difficult night in the European elections. 'And, because they are announced on a council by council basis, every MP will be able to reverse engineer the result in their own constituency. 'At that point, I believe, my colleagues will finally wake up and smell the coffee if they have not, indeed, done so already.' The Brexit Party led by Nigel Farage (front and centre in Merthyr Tydfil, Wales last night) is leading the polls for the European elections, with the Tories languishing in fifth Labour is also increasing the gap between them and the Tories, a new opinion poll revealed this week It came as Tory hardliners, the DUP and Labour lined up to say they would vote it down a fourth time. Brexit Secretary Steve Barclay and International Trade Secretary Liam Fox both warned that another rejection could lead to Brexit being cancelled. The Prime Minister will today appeal to Tory grandees for a stay of execution while she makes a final attempt to pass her Brexit deal in just over a fortnight. The executive body of the 1922 Committee of backbench Tory MPs will meet Mrs May this morning to decide whether to change the party's leadership rules and allow a fresh contest that could see her forced out within weeks. Asked if the new vote would be considered a 'confidence vote' for Mrs May, a No 10 source said: 'That's not the world we are currently in but clearly the significance of this legislation can't – and I suspect won't – be underestimated.' Mr Barclay told MPs the deal negotiated by Mrs May with Brussels would be 'dead' if MPs rejected it again, raising questions about whether the UK would ever leave the EU. Dr Fox, meanwhile, told an event in London: 'MPs will have to look and see if they want to continue down a path that inexorably takes us to either the potential revocation of Article 50 or leaving without a deal, and ask themselves if that's the best course democratically or economically for the UK. MPs will have to face that decision.' Last night Eurosceptic MPs were lobbying members of the 1922 Committee's 18-strong executive to ignore Mrs May's pleas and pull the plug on her today. One former Cabinet minister said her decision to promise a new vote on her Brexit deal next month was 'just a scam to try and head off the 1922 Committee changing the leadership rules', adding: 'They have to see through it. She cannot be allowed out of that room without giving a date for her departure.' Opinion on the executive committee was said to be finely balanced after a 'heated' meeting last night. Last month, members voted by nine to seven against changing the rules to allow a fresh vote of confidence in Mrs May's leadership. Instead, they demanded a clear timetable for her departure. Sir Geoffrey Clifton-Brown, treasurer of the 1922 Committee, said yesterday it was 'sadly now time to hand over the reins to someone else with fresh ideas and the moral authority to lead the party'. Chairman Sir Graham Brady, who has favoured a 'dignified' departure for Mrs May, is also said to have hardened his position, and this week signed a letter criticising her decision to open talks on a soft Brexit deal with Labour. No 10 confirmed yesterday that MPs will be asked to vote on the Withdrawal Agreement Bill in the week beginning on June 3. Mrs May urged MPs on all sides to back the deal, saying: 'This is the Bill that delivers Brexit.' But a Shadow Cabinet minister told the Mail: 'Jeremy [Corbyn] might be happy to let this Brexit deal go through but there is no way the party will let it happen.' Mrs May's DUP partners also ruled out backing the deal while it contains the Irish backstop. And hardline Eurosceptics, whose opposition has scuppered the deal three times, indicated they would not back down. Former Cabinet minister Owen Paterson said: 'Sadly, we will vote against it again because it doesn't change the essential nature of the withdrawal agreement, which is unacceptable.' All rights reserved for this news site dailymail and under his responsibility