Jamie Cullum's to support homelessness charity Shelter by performing a one-off gig on the roof of its HQ on May 21.

The gig will be streamed live via www.england.shelter.org.uk, and the charity's chief executive Campbell Rob said 'We're so excited Jamie is coming to Shelter. This is the first time we've ever had someone perform live at our offices, let alone on our roof, and we're delighted to be sharing this event with some of our top fundraisers from the London marathon'.