Only Victoria Wood could write a line like: 'And where has it got you, having a pelvic floor like a bulldog clip?' Her comic creations " from scallop-faced punks to menopausal dinnerladies " will live for everKelly-Marie Tunstall and her exploratory operation " that was how I first met Victoria Wood. Aged about 10, I sat mesmerised in front of a family friend's new-fangled video recorder watching a tape of Victoria W…