I was listening to ‘Pop Masters’ on BBC Radio 2 this morning. This is not a competition I am ever likely to enter. Musical facts and dates are just not things I can reliably recall to order. My prowess at musical quizzes stops short of being able to name much more than the winner of ‘Eurovision’ in 1967 (Sandy Shaw) I was ten, I liked ‘Puppet on a String”. The DJ introduced the first contestant. “If I do badly, I think I can claim to have ‘Mummy-Brain’ even though my daughter is seven months old,” declared the latter. The DJ was sceptical, “Can one have ‘mummy-brain’ after the event? Isn’t…