Veteran Labour MP and former minister Chris Mullin has been named as the interim chairman of the Commons select committee on standards and privileges.
He will stand in for Conservative MP David Curry, who resigned last week after he was accused of claiming £30,000 for a constituency property which his wife had banned him from using after an affair.
A committtee official told ePolitix.com that Mullin will stand in as chairman until Curry is replaced on the committee.
At that time a new chairman will be named.
The committee oversees the work of the Parliamentary Commissioner for Standards and considers matters relating to the conduct of MPs, including specific complaints in relation to alleged breaches in their code of conduct.
It has been rocked in recent days not only over revelations about Curry.
Another member, Labour MP Andrew Dismore, has faced calls he should stand down over his expenses claims.
He reportedly 'flipped' his second home designation in order to claim £65,000.
Dismore claimed £34,000 in second home expenses for a west London flat which housed his girlfriend's homeopathy surgery, while designating a north London flat as his main home.
It is alleged that he then switched his second home designation to the north London property and claimed a further £31,000.
In a statement defending his claims Dismore, also the chairman of the joint committee on human rights, said: "It was my intention when I bought the Hendon flat for it to be my main home.
"After about 18 months it became clear to me that with increasing parliamentary demands on my time I was spending more time in London than in Hendon, so it was the right thing to do to designate the Hendon property as the second home and the London property as the main home.
"The London home was not a homeopathic surgery. This arrangement continued till I ceased claiming for Additional Costs Allowance (ACA) at the end of the financial year 08/09.
"The Hendon property was cheaper to run, which was also an important consideration to me, and my claims progressively and rapidly reduced year on year since then.
"Although I could have claimed more I did not do so. Although not yet published, for my last year of claim 08/09 the total amount was just under £3,000."
Mullin has been MP for Sunderland South since 1987. He is standing down at the next election.
He has one of the lowest expenses claims of any MP. A junior minister under Tony Blair, earlier this year Mullin published a highly-acclaimed memoir, View From The Foothills, about his time in government.
Dods Parliamentary Communications Ltd