Banksy offers to raise £10m to buy Reading prison for art centre

Artist would sell stencil used to paint mural depicting what was thought to be Oscar Wilde on listed building

Banksy has offered to raise millions of pounds towards buying Reading prison, where Oscar Wilde was once held, so that it can be turned into an arts centre.

The street artist has promised to match the jail's 10m asking price by selling the stencil he used to paint on the Grade II-listed building in March, a move campaigners hope will prevent it from being sold to housing developers.