Three elite cyclists set off on an 18,000 mile trip from Greenwich this afternoon. The World Cyle Race is thought to be one of the toughest cycling competitions on the planet. It's expected to take the team around 3 and a half months to complete.
Lee Fancourt is taking part in the race and he told ITV News why he decided to raise money for Great Ormond Street Hospital.
The family of a two-year-old leukaemia patient has raised more than £20,000 for Great Ormond Street Hospital (GOSH).
Yasmin Parsons, from Woodford Green in Essex, is being treated at the hospital after being diagnosed with acute lymphoblastic lymphoma in August.
Her parents, photographer Andrew Parsons and writer Karen Attwood, created a blog - www.ourlifewithleukaemia.blogspot.co.uk - which tells the story of Yasmin's treatment and aims to raise awareness of childhood cancer while raising money for GOSH.