One of the highlights of Oxford hospice fund-raiser Childish Things is to be turned into a download to raise further cash for the cause.

Each year Helen and Douglas House, based in East Oxford, stages one or more nights of comedy at Oxford’s New Theatre and for the first time this February a music night was held.

Two of the stars of the show, jazz singer Jamie Cullum and beatboxer Beardyman, took to the stage together for a completely unrehearsed and improvised performance.

Now a live recording of that performance is to be sold through the hospice website for £1 a download.

Kate Day, who organises the event along with Lizzie Pickering, said: “Jamie Cullum and Beardyman decided half an hour before the show started that they might do a little improvisation together.

“What the audience heard was absolutely the first time anybody had heard them play together. It really was a world exclusive and it was absolutely amazing.”

After the show, Beardyman, real name Darren Foreman, told the Oxford Mail that the jamming session was “even more fun” than it looked.

And Mr Cullum said the basis for their plan had been that his collaborator had said “you start, I’ll follow”.

Now the two stars, their management and their publishing companies, have agreed for the exclusive download to be made available from helenanddouglas. where it will go live next Monday for two months.

Miss Day said: “It is exciting because it is the first time we have ever had a spin-off from Childish Things.

“We have no target in mind, but if it spreads through social media, there is the potential for it to raise quite a lot of money.

“It feels like we have given Childish Things a slightly longer life through the year.”

The three Childish Things nights in February raised £110,000 for the hospice, setting a new record and bringing the total over the eight years it has been running to more than £400,000.

The New Theatre, in George Street, gives use of the theatre to the hospice for one of the nights, contributions from bar and ice cream sales, and many of the staff donate their wages for the night.

The dates have now been set for next year and it has been confirmed that again there will be one music night, on Monday, February 4, followed by two comedy nights, on Tuesday, February 5 and Wednesday, February 6.

Tickets will go on sale in the next few weeks.