Oh that's sad. I've actually played in a very low league cup competition against a junior side with Colin on board one (i was deposed from playing him unfortunately, but we won the match on the lower boards..went on to win the cup as it happens..)
He was very active and generous with his time, especially with the children. Pinner juniors will never be the same again, i'm sure in the future he will be remembered for his contribution to chess. Rest in Peace to lovely man.