SOPHIE'S STORY: @Sophmarshall13 from #Dronfield #Derbyshire is one of a record number of runners taking on the #LondonMarathon
The Duke and Duchess of Cambridge and Prince Harry will start this morning's London Marathon.
Their Heads Together campaign is the official charity.
A record number of runners are taking part, Sophie Marshall from Dronfield in Derbyshire is one of the 40,000!
The 25-year-old has already raised more than £13,000 for the Teenage Cancer Trust after her friend Eddie died from a brain tumour when he was 19: