WATCH: Mansfield dad Callum Young takes to the pool for mammoth fundraiser
Warsop dad-of-two Callum Young is swimming an incredible 100km over 100 cumulative hours during November to raise money for children's heart charity Tiny Tickers.
It follow the diagnosis of a congenital heart defect in his four-week-old daughter, Winnie.
Callum is now hoping to raise vital funds to help other families facing similar experiences.
Watch our video to hear more about his challenge and why he's determined to make a difference
Callum Young is taking on a huge challenge for a cause very close to his heart at Warsop Health Hub.
You can read his full story here.