It has touched Bury North particularly because its Labour MP, David Chaytor, is among the handful now facing criminal charges.

ECONOMIST: Bagehot

The other three - Margaret Moran, David Chaytor and Elliot Morley - have said they will stand down at the next election.

BBC: MP quitting to force by-election

Ms Moran is the third MP - after Elliot Morley and David Chaytor - to be referred to the panel over their conduct.

BBC: Moran's future as MP under review