Thousands of cyclists are racing through Norfolk's picturesque landscape today, in the fourth Richardson's Tour de Broads event.

Around 2,500 participants are taking part in this year's event, which is seeing cyclists select from one of four routes around Norfolk's famous attraction.

All four races start at the former RAF Coltishall base, and will see cyclists enjoy either 9.5, 40, 76.4 or 100.5 mile courses.

Each race began at 8am this morning, with the event receiving its highest sign-up number yet.

The event has grown each year, with around 700 cyclists taking part in the first event, 1,200 the following year, and approximated 2,100 last year.

This year's designated charities are Macmillan Cancer Support and Love the Broads, though cyclists were welcome to ride for their own chosen charities as well.

Helen Rainbow, events manager for Pedal Revolution, who organised the event, said: 'The Tour de Broads has continued to get bigger and bigger each year and this year's promises to be brilliant.

'It's a little bit windy but it's clear at the moment so it's looking good for today.'

Cyclists will pass through several towns and villages surrounding the Broads, including Reedham, Ranworth, Horning and Filby.

Each route will then finish back in Coltishall, with the last finishes expected around 6.30pm.