TODAY is my birthday. And it's not just any old birthday because today I turn 50. If you've ever seen a photograph of me, my defence is I've had a hard life. Anyway, working on the theory that there's no point writing a column in the daily newspaper you edit without indulging yourself from time to time here's my not-particularly-serious guide to the last 50 years. 1966-1969: I'm born at Worcester Royal Infirmary on the day the Beatles top the pop charts with Eleanor Rigby/Yel