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A young boy with dark hair uses forearm crutches to walk on a grassy area. He wears a light blue shirt and looks determined. In the background, a person cycles past a modern building with arched structures and a long reflecting pool.

Support vital medical research

Into a wide range of childhood conditions including rare diseases, cerebral palsy, autism, cancer and premature birth — and help drive discoveries that could change children’s lives.

Funding vital research

We’re on a mission to save and change children’s lives through medical research, developing treatments, vaccinations and cures.

Childhood cancers

In the UK almost 4,000 children and young people under 25 are diagnosed with cancer every year. We are funding research to try and improve the chances and treatment for children with brain tumours and cancer.

Successes

With the help of all our supporters we have played a significant role in many medical breakthroughs for 70 years, starting with the development of the first UK polio vaccines.

A group of marathon runners participate in a city race. A smiling woman in the foreground waves at the camera, wearing a pink cap, blue Action running top. Crowds line the street, cheering near historic buildings and race signs.

TCS London Marathon

Sunday 26 April 2026

Make it your goal to take on one of the world's most famous, and sought-after mass participation events, the TCS London Marathon! Apply for a charity place with Team Action to receive VIP treatment at the most prestigious marathon in the world.

Cycling Events

With cycling challenges both in the UK and abroad, there's definitely a challenge waiting for you. From beginners to the very experienced and with routes ranging 20 miles to hundreds of miles, come and join us in the fight for little lives.

Race the Sun

Our triathlon-style Race the Sun series pits teams against each other in a race against the setting sun, competing to bike, hike and paddle around some of the UK's most beautiful locations.

Running

Whether you’re looking for your first challenge or you’re a seasoned runner we’ve got an event for you. We have places in the world’s greatest and best-known events and races.

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