British Prime Minister Theresa May's job is safe, for now, after Conservative lawmakers decided against enabling a new challenge to her leadership.

Graham Brady, chairman of a powerful party rules committee, said on Wednesday the body had decided not to change the rule that a party leader can only face one no-confidence vote in a year.

Pro-Brexit Conservatives are angry with May's failure to take Britain out of the European Union, almost three years after voters backed leaving. They want her replaced with a more staunchly pro-Brexit leader.

But May survived a Conservative no-confidence vote in December, leaving her safe for 12 months.

May says she'll step down once Parliament has approved a Brexit deal.

Brady said, however, that May must provide more clarity about her departure and provide "a clear roadmap forward."