Keiton has been paralysed from the waist down by the leukaemia

Keiton Knight from Hove has been battling leukaemia since 2003 and will die if a donor is not found soon.

As he has a white mother and a black father, he can only find a match from another mixed race person.

A special unit will be set up near the event at Sound in London's Leicester Square on Saturday for would-be donors.

The concert will run from 1300 to 2100 BST, with the Anthony Nolan Trust clinic at the Choice FM building opening from 1100 BST.

Artists such as Kenny Ken, Don-E, Blak Twang, Omar and Natalia have promised to appear at the event, with many more expected.

BONE MARROW DONOR CLINICS Sunday 8 October, at the Christian Life Fellowship, The Borough Hall, Royal Hill, Greenwich Wednesday 11 October, at Leopold Primary School, Hawkeshead Road, Harlesden Thursday 12 October, at Katherine Road Community Centre, 254 Katherine Road, Forest Gate

Keiton's appeal has already been to the Notting Hill Carnival, and three more clinics will be held in London this month.

He was just four when he was diagnosed with acute lymphoblastic leukaemia in June 2003.

His mother Paris, 32, has said if a matching donor is not found, Keiton will die.

She said doctors did not want the search to find a donor to go on beyond November because of the amount of time her son has already spent receiving chemotherapy.

"People need to get their blood tested now to see whether they could be a match."

Keiton's donor must have one black and one white parent and be aged between 18 and 40.