The Sunday Times' political editor is reporting May will meet Sir Graham Brady this afternoon.
Sir Graham is chair of the 1922 committee, the group all Tory MPs are members of.
Conservatives can send "no confidence" letters to Sir Graham calling for May to go. If 48 are received, it will trigger a vote of confidence within the party.
Jacob Rees-Mogg, the chair of the European Research Group, which represents around 50 Tories pushing for a harder Brexit, is submitting a letter to Sir Graham Brady, chair of the 1922 committee, requesting a no confidence vote in Theresa May, my colleague Heather Stewart reports.