More than 300 people took part in a unique multi-sport event at Dorney Lake on Sunday.

The ‘One for the Planet’ event, near Windsor, saw participants run, swim and cycle all in aid for climate impact projects.

Each sporting challenge converted exercise into funding for climate causes. Those taking part in the triathlon raised money for planting coral in the French Polynesia, aqua events funded removing plastic from the ocean in Indonesia, and running events helped plant kelp in British Colombia. As well as this, a tree was planted in Kenya for every ticket sold.

It was organised by the app Climategames with events company One Race, based in Maidenhead and Marlow.

Founder of the app, Martin Lacey said: “We are thrilled that ‘The One for the Planet’ was such a success and are really looking forward to making more people’s movement matter, by converting it into positive climate impact.”

He added that using sport to raise awareness for climate change is “incredibly important” and encouraged everyone to “learn about the issues are planet is facing”.

Eco businesses such as the ECO Action for Maidenhead and Windsor, the local climate education hub, were there to see the action. Local clean water campaigners the Henley Mermaids also took part.

Spectators got to join in, too, by tracking their steps through the Climategames app, which contributed to the environmental effort.

As well as this unique event, the Climategames app has been used by thousands of people across 110 countries.

The other organisers, One Race, creates safe, interesting and challenging events for people with a range of abilities.