Theresa May is expected to have discussions with the chair of the 1922 Committee of Tory backbenchers today, as calls increase for her to set a firm resignation date.
The Prime Minister's meeting with Sir Graham Brady comes after the 1922 Committee requested "clarity" about the Prime Minister's timetable for standing down and triggering a leadership contest.
Mrs May has said she will step down if her Withdrawal Agreement is ratified, but has not made clear how long she intends to stay if no deal is reached by the end of October.
Sir Geoffrey Clifton-Brown, treasurer of the 1922 Committee, put the spotlight on a departure date by insisting Mrs May announce a "road map" for her resignation after the European elections set for May 23.
Meanwhile, talks restart today between the government and the Labour Party in an effort to find a way through the current Brexit impasse.
However, shadow chancellor John McDonnell said he had no trust in Mrs May after reports emerged that she is ready to offer a temporary customs arrangement with the EU to the opposition.
And Labour accused Mrs May of having "blown the confidentiality" of the talks.
Leading Eurosceptic Sir Bill Cash told the Press Association it was "the time" for Mrs May to step down.
"The time has come for her to resign," he said.
"She needs to be given a date. The sooner the better. But it needs to be done in an orderly manner."