Today all candidates need 30 nominations to make it through to the next round. One dark horse in the race is Penny Mordaunt who is seen as Labour's greatest threat. This morning she held her official campaign launch in at Westminster's Cinnamon Club - promising to 'fix a broken Whitehall'.
But will she be able to see off her rivals in the Tory leadership race?
Katy Balls speaks to Fraser Nelson and James Forsyth.
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