Bridget Riley has been creating abstract paintings for 50 years – and her latest work is as tantalising as ever, says Tom Lubbock
An exhibition close to a burnt-out south London estate looks long and hard at the gulf between 'us' and 'them'
Bridget Riley's paintings are beautiful creations, but should they be regarded as fine art – or merely framed wallpaper?
So says the critic Brian Sewell, and the art market seems to agree, with men's work commanding millions more at auction. By Andrew Johnson