Andy was a terrific guy and a very accomplished scientist. He was somebody that so many of us would seek out at meetings. He would always have a smile and discussions of science with him would always be enlightening. He was generous of spirit and he was never negative about anybody. We will all miss him greatly. I hope his family can take some consolation from the achievements he had already made although we could all have hoped for more. Mitch Dowsett (Prof at Royal Marsden)