Three brothers are setting off this morning to swim the entire length of the River Eden.
Robbie, Calum and Jack Hudson plan to complete the 90-mile journey in nine days in a feat they say will make them the first people to ever swim the whole of the river.
The brothers now live away from Cumbria but grew up in Langwathby near Penrith and spent their childhoods roaming the countryside and swimming in rivers.
The River Eden is the ninth longest in Britain. It starts at Mallerstang on the border between Cumbria and North Yorkshire and flows into the sea at the Solway Firth. The brothers will have to navigate rapids, jump waterfalls, gorges and weirs and conquer the river.
Their adventure is in aid of the Swimming Trust - a charity dedicated to getting more people swimming.