From BBC News:
The leaders of Britain's most prominent cultural bodies are to appeal directly to the prime minister not to cause irreparable damage to the arts.
The coalition government has asked all major arts funding bodies to show how they would manage cuts of 25% or 30%.
Culture minister Ed Vaizey has said everybody has to take their share of cuts.
Arts Council England will join organisations like the National Theatre and Tate to make the appeal later.
Mr Vaizey said organisations were "absolutely entitled" to make their case to government but "everybody had to share their burden of the cuts that were coming".
"Nobody should be in any doubt at all that we strongly support the work that arts organisations do in this country, but equally they have to be in no doubt at all that we face a very tough financial environment left for us by the last Labour government.
"We're going to work together to make sure that we can continue to deliver first class arts to as many people as possible but we have to work together to make this happen," he said.
The government hopes private money will help plug the gap, but it has emerged some of the country's leading philanthropists are writing to Prime Minister David Cameron warning that such an ambition is overly optimistic.
The appeal comes the day after a warning that the number of theatres at risk of demolition could grow in the next year because of funding cuts.
The Theatres Trust latest "at risk" register highlights 55 buildings facing an uncertain future, with cuts seen as a major area of concern.