I know it's a terrible longshot - your post is almost 8 years old now - but I think we're talking about the same person. I worked at the CO-OP too - and met Wendy around 1963/4 - at the time she was living in a flat on Grange Crescent Road - off the top of Cemetery Road. Quite tall and elegant, very pretty, quite reserved and well-spoken - relatives in Liverpool. I often wonder what happened to her.