John Don-Duncan paid tribute to his Team GB swimmer daughter on Facebook - sharing a photo of him, his partner, Linda, and Helen smiling together in a family photo.
Dad pays tribute to Team GB Olympic swimmer who 'died in her sleep' birminghammail.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from birminghammail.co.uk Daily Mail and Mail on Sunday newspapers.