So tonight's the night that Jack Carroll either makes it big on Britain's Got Talent or heads back to obscurity. Nothing of the sort of course. The 14-year-old sit-down-sometimes stand-up has become something of a national hero since his first appearance on Simon Cowell's variety trade fair. Even David Walliams rather over-excitedly dubbing the lad from Hipperholme near Huddersfield the next Peter Kay should not hold Carroll back from a successful career in comedy.