Harry is an 11 year old boy who has challenged himself to swim 15,000 metres made up of both pool and open water swimming, over the school holiday.

This isn't a one off event, this is about commitment, discipline and dedication to the cause. 

This equates to 1,250 lengths of a 12m swimming pool. In relative terms this equates to swimming the height of both Mont Blanc (4,808m) and Mount Everest (8,849m) or, half the length of the River Adur or, 46 times the height of the Eiffel Tower. 

The Royal Marsden Cancer Charity raises money solely to support The Royal Marsden, a world-leading cancer centre. They ensure our nurses, doctors and research teams can provide the very best care and develop life-saving treatments, which are used across the UK and around the world. From funding state-of-the-art equipment and groundbreaking research, to creating the very best patient environments, they will never stop looking for ways to improve the lives of people affected by cancer.