We have all seen the film of the Downing Street rat. Yet, reports the BBC, the authorities are refusing to embrace the obvious solution, follow Winston Churchill and get a cat.
On reflection, we Liberal Democrats should have insisted that this measure was included in the Coalition agreement.
You will remember Humphrey, who held the position of Chief Mouser to the Cabinet Office under John Major. He was shot by the incoming New Labour administration at the personal insistence of Cherie Blair.
Later Alastair Darling had a cat called Sybil at 11 Downing Street.