Mike Disney, professor of physics at the University of Wales, Cardiff, is taking a lead in town- gown links as he blows the city's trumpet on the London Underground. Huge posters of the university lecturer spinning through space welcome commuters to the "Amazing Universe of Disney" where Cardiff is at the forefront of space research. Professor Disney, who gave his services to promote the city free of charge, said: "I was conned into going along with it. But if it makes a few people look at the Hubble deep field behind me then it's worth it."