Theresa May needs the support of a majority of the 315 MPs to continue to lead the Conservative party. Here are the likely scenarios...

1 A CLEAR MAJORITY

If May wins the overwhelming support of MPs, her leadership cannot be challenged for 12 months.

2 A SMALL MAJORITY

If May wins but there’s a large minority against her, May might decide it’s time to resign, triggering a leadership contest.

3 A MINORITY

May must win the support of at least 158 MPs. Anything less, and a leadership contest is triggered. She cannot run.

4 SMELLING BLOOD

Even if a weakened May wins the support of her MPs, her minority government can still face a no confidence vote in parliament.

Bloomberg Theresa May departs No 10 Downing Street on her way to a weekly question and answer session at Parliament in London.