Tony Slattery was one of the most gifted TV comedians of the late 80s and early 90s       One of the Cambridge Footlight set that included Stephen Fry, Hugh Laurie and Emma Thompson, he became a household name on Whose Line is it Anyway? Then in 1996, amidst rumours of a massive breakdown, he seemed to vanish from our screens overnight       　　Now as he approaches 60, Tony has been touring