A friend asked me casually last week if I’d like to go to the theatre. I said yeah, why not, and rocked up last night in my old jeans covered with icing sugar (baking catastrophe, don’t ask) to the Young Vic, to realise too late I’d got the hottest ticket in town – only the first night of Michael Sheen’s Hamlet! Funnily enough I had been reading my friend Family Affairs’s blog a few days ago and wondering how on…