Peter Tyndall Walwyn MBE (born 1 July 1933) is a retired British racehorse trainer. He was based at stables at in the Lambourn, Berkshire, area and enjoyed his period of greatest success in the mid-1970s when he was British flat racing Champion Trainer twice.Walwyn comes from a racing family - he is the cousin of trainer Fulke Walwyn. He was educated at Charterhouse School and his first job in racing was as assistant to trainer Geoffrey Brooke.