Commons leader Andrea Leadsom has resigned from the cabinet, saying she no longer believes the government will deliver Brexit .
In her resignation letter to Theresa May, she said: "I no longer believe that our approach will deliver on the referendum result".
She also said that holding another referendum would be 'dangerously divisive'.
Leadsom's resignation comes amid intensifying pressure on Theresa May to quit as prime minister.
She added in her letter: “No one has wanted you to succeed more than I have, but I do now urge you to make the right decisions in the interests of the country, this government and our party.”
A string of ministers have demanded meetings with the PM.
Some are said to be furious about her 'new deal' to encourage MPs to back her withdrawal bill.
May has offered MPs a chance to hold a vote on another referendum if they back her Withdrawal Agreement Bill.
This legislation is needed to implement the agreement between the UK and EU on the terms of Brexit.