Tony is such a great part. Talk about the seventh level of the inferno. The last couple of days I've been travelling home from rehearsals thinking, why do I feel so terrible? Then going, oh yeah, of course, it's my slide from the heights of inherited wealth, through alcoholism to sexual depravity and general darkness. And Mickey Feast is perfect as Barrett - if he wants to, he can switch from being very charming and seemingly quite ineffectual to being bloody terrifying. I think it is one of the great double acts in literature.