He is the RYA Honorary Sport Psychologist, and has worked with many of Britain's best - known Olympic and international sailors. John Derbyshire, a former PE teacher, achieved international success as a sailor before he became an RYA Olympic coach, with responsibility for fitness. John Whitmore has had a long and distinguished career as a racing driver and as a tennis and ski coach, and has taught many performers to master the mental demands of sport at the highest level.