The Union of Voters say if the Prime Minister stands down in the middle of a Parliament, then a general election should be called.

In Thursday's Snap Poll, we asked the Union: 'Should the party in power be able to change the Prime Minister without calling a general election?'

An overwhelming majority (74%) of those polled said that a government in power should not be able to change leadership without calling for an election. This would mean an automatic general election if Gordon Brown were to stand down now.