They have been debating a motion to revive the moribund Select Committee on Members' Allowances to conduct a review of the expenses system.

BBC: Ipsa: Adam Afriyie set to head review of MP expenses

In February this year, Parliament's Committee on Standards in Public Life decided against launching an inquiry into MPs' allowances.

BBC: McNulty defends expenses claims

The Prime Minister has asked Sir Christopher Kelly and the Committee on Standards in Public Life to look at all of the relevant issues involved in MPs' allowances as speedily as possible.

BBC: In full: MP expenses reform plans