An experienced charity cyclist is gearing up for his biggest challenge yet – an overnight ride from Portsmouth to London.

Tim Simmonett, from Baker Street, Enfield, will be cycling 100 miles in one go from the harbour city to the Imperial War Museum, starting at 2am on July 3.

The 55-year-old father-of-two, who is riding to raise money for Help For Heroes, has done two similar challenges in the last two years, raising £5,000, but he says those have always been spread over a couple of days, and this will be his toughest attempt.

He said: “I am a bit dubious, but once you get going, you realise it can actually be enjoyable.

“It’s not an easy ride, there are a lot of hills to tackle, particularly over 100 miles in one day. I’ve been practicing by cycling between 20 and 40 miles every weekend.

“Help For Heroes is a good cause, my dad and uncle were in the army. There are a lot of injured people who, when the conflict is over, people just forget about them.

“Whenever I think these rides are difficult, I see injured soldiers, amputees, are doing them too. That inspires me to keep going.”

Mr Simmonett says he aims to reach the museum by noon on July 3, where he will be greeted by his family – meaning he aims to cover 100 miles in just 10 hours.

You can donate to his Just Giving page by clicking here.