Marathon world champion and record holder, Paula Radcliffe, visited three schools by helicopter this week to launch what it is hoped will turn out to be the world's biggest ever walk or run.
The organisers of the Tesco Great School Run estimated that a record-breaking 250,000 runners aged seven to 11 took part in simultaneous two-kilometre walks or runs around the country on Wednesday.
Ms Radcliffe ran with pupils at Sherrier CofE primary, in Lutterworth, Leicestershire, before flying to her old school, Lincroft middle, in Bedford. Her last stop was Donnington primary, in north-west London. She said: "It is a terrific way to encourage more kids to take part in sport and see the advantages of healthier outdoor activities."