Robotic vacuum cleaner manufacturer, iRobot, has sent an open letter to the new Prime Minister offering to clean up Gordon Brown's mess at 10 Downing Street. The company is happy to give David Cameron a Roomba automated cleaner to help him settle in.

There's no answer yet from Downing Street (perhaps the PM's busy moving in), but iRobot has promised to keep us informed.

Here's the letter in full: