Sean Farrington has a look at the money behind sport - this week: mass-participation events.

It's big business - from the thousands of competitors that sign up to take part, to managing the event itself, to the fundraising.

Sean hears from Paul Foster, the Chief Executive of The Great Run Company - the company behind the Great North Run and many other events across the country. He'll also speak to Nick Tuppen, Chief Executive of Threshold Sports, one of the UK's fastest-growing active events agencies who coordinate more than 50 mass participation events per year.

Producers: Stefan Jajecznyk & Olivia Baron