Another former MP, Margaret Moran, has been charged with false accounting - she has not yet entered a plea.

BBC: Watchdog refuses to sign off Commons accounts

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

"That Ms Rantzen continues to be so interested in Luton - where she has no apparent links and even though Margaret Moran is standing down - has surprised many Lutonians, " he added.

BBC: Rantzen will run for Parliament

"The panel will report back as soon as possible with recommendations to the organisation committee of the NEC on whether to remove Margaret Moran's endorsement to stand for election as a Labour Party candidate, " the party said.

BBC: Moran's future as MP under review