Sir Nicholas and Ann Winterton, the Conservative MPs, are to resign from parliament at the next election.
Their decision comes after the Telegraph disclosed that they claimed more than £80,000 in rent for a small London flat that was owned by a trust controlled by their children.
Expenses submitted by Sir Nicholas show he claimed for £41,508 in rent. His wife’s claims amounted to £41,584.
Since 2002 the Wintertons’ flat in Westminster has been owned by a trust which is controlled by their children.
The decision to pass the property into a family trust was reportedly designed to save hundreds of thousands of pounds in death duties.
The trustees are Sir Nicholas and Lady Winterton, together with the family’s lawyer. For four years the pair submitted rental claims of £900 a month each.