The Labour MP for Exeter is calling on the party's ruling body to consider a new direction for the party.
They meet today to discuss a timetable for the election of a new leader.
Dan Jarvis - who was considered one of the favourites - has ruled himself out, saying it's not the right time for his family.
Shadow Health Minister Liz Kendall has become the first to put herself forward - other potential candidates include Andy Burnham and Chuka Umunna.
Ben Bradshaw says someone the public know needs to be picked.