Woo. Britain's Got Talent is back. Oh yes, the show that brought us the operatic stylings of Paul Potts, the urban dancing of Diversity, the mind-blowing news that someone who looks like Susan Boyle can sing (who'da thought it? OK, everyone except a ... (more)trio of superficial judges, to be fair) and last year's gymnastic-tastic winners, Spelbound, began again last night with an hour-and-a-half rammed with 30 minutes of half-decent material (the montages really are as good as ever – look: a girl with a harp. A Michael Jackson impersonator. A boy with a guitar asking when he can go and have something to eat.) and an hour of the sort of guff that makes staying in on a Saturday such a pleasure