A former Conservative minister has urged the cabinet to "get a grip" and act "collectively to shape Brexit".
There have been rumblings among some of the party's MPs about the performance of both the chancellor and the prime minister as the negotiations dominate.
Writing for ConservativeHome, Nicky Morgan, MP for Loughborough, said: "There were times last year for the prime minister to step aside – immediately after the June 2017 election, or after Party Conference.
"That didn’t happen. Maybe the cabinet should have asked her to go, but they didn’t.
"We are now into a critical nine months for the future of the country, so the Cabinet need to get a grip by acting collectively to shape Brexit".
The PM's official spokesman said she was "grasping the many opportunities" of Brexit while also acting on housing, schools and the NHS.