Take an average 1970s hospital in an average provincial British city: big, concrete, sprawling, impersonal, set on the edge of town. Then ask one of the world's leading architects to add a tiny new building to the complex. Will anyone notice? They will if the architect is Frank Gehry, author of the Bilbao Guggenheim and the new Disney concert hall in Los Angeles. It happens that Gehry's first British building is a little cancer support centre at a hospital in Dundee.