DOUBLE Olympic silver medallist Jazz Carlin is taking on a mentoring role as she heads out to the United States this week for training and competition. Swindon’s Carlin, who lives in Bradford on Avon and is coached by Dave McNulty at the British Swimming National Centre Bath, is working with a group of 17 promising female swimmers – all aged between 16 and 18 – as part of the new Performance Foundations Pilot Programme.