Addenbrooke’s Charitable Trust is teaming up with musician Mat Bayfield and his girlfriend Kelly Pritchard for an impromptu ‘performance’ on the roof of Addenbrooke’s hospital.

Titled ‘Addenbrooke’s Rocks!’ the concert is being held to celebrate the hospital’s 250th anniversary and will feature legends of the rock world.

Organised in partnership with the Cambridge Rock Festival, the concert will be headlined by Deep Purple keyboardist Don Airey – and Friends.

Fresh Cream, consiting of Malcolm Bruce, together with Will Johns, nephew of Eric Clapton and some special guests, will perform a fans tribute to Jack Bruce and the music of Cream.

East Anglian folk band The Broadside Boys will open the evening, with more artists yet to be announced.

The concert is being staged because each of the performers has an association with Addenbrooke’s. Their participation is to thank hosptial staff for the care and treatment they or a family member has received.

Don Airey has supported the hospital since his son was treated for a serious illness in 1992 and

Jack Bruce, bass player with the 60s supergroup Cream, who died in 2014, received a liver transplant at Addenbrooke’s in 2003.

Mat Bayfield, vocalist with The Broadside Boys, was diagnosed with a rare incurable brain tumour in December 2012.

“I always say that life is no rehearsal so you should make the best of every day,” he said.

“I can’t thank the oncology team at Addenbrooke’s enough for all the care they have given me over the past three years. They are the most wonderful, caring bunch of people I have ever met.”

Michelle Gray, head of community fundraising at ACT, said: “It is wonderful to be working with such a talented group of people who are all giving up their time freely to say a personal thank-you to the staff at the hospital.

“The money raised will be used to ensure that the hospital can continue to offer care and facilities for generations to come.”

The concert takes place on August 3 from 5pm at Haggis Farm Polo Club, Barton.

Tickets; £15 to £25 are available from www.cambridgerockfestival.co.uk and all proceeds will be donated to ACT.