It is hoped a replacement can be found for London's Astoria

The Astoria, which faces demolition to make way for a new cross-London rail link, is one of the high-profile venues under threat in the capital.

Music fans have been campaigning to save the theatre, which has played host to bands such as Nirvana and U2.

Culture Secretary James Purnell said: "I want to do everything we can to support live music."

The Department for Culture, Media and Sport said it would work with the Mayor of London "to see what can be done to ensure key music venues are not closed down in London and, if they are, to explore how suitable replacements can be provided".

In January the decision was made to demolish the Hammersmith Palais, and Camden's Electric Ballroom could also be under threat.

Small venues

The government has also said it will explore the idea of licence exemptions to help small venues - such as restaurants, cafes and community halls - whose main business isn't to put on live music.

"Clearly we'd only be looking at exemptions for events that don't cause public nuisance or compromise public safety," said Mr Purnell.

He has also pledged �500,000 for a new pilot which will help set up professionally equipped, community rehearsal spaces for young people.

"Nurturing young bands and artists and making sure they have a place to play is absolutely essential," he said.