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JDRF has now rebranded to Breakthrough T1D.
Our name has changed, our mission has not.

Runs

TCS London Marathon 2025

If you’re only ever going to do one marathon, make sure it’s the TCS London Marathon.
Location: Greenwich Park, London SE10 8QY Date: Sunday 27 April 2025 Price: £100

Four people from behind standing in park and wearing Breakthrough T1D running vests

About the event

If you’re only ever going to do one marathon, make sure it’s the TCS London Marathon. 

From the cheering crowds and thrilling atmosphere to the world-famous landmarks lining the 26.2-mile route from Greenwich to the Mall, it’s no surprise that this is one of the most famous races in the world. 

Run the TCS London Marathon with Team Breakthrough T1D in 2025 and make every mile count by doing something amazing to help those living with type 1 diabetes. 

In 2025 Breakthrough T1D aims to have around 200 runners taking part in the TCS London Marathon, helping us to reach our goal of a combined total of £450,000 to fund type 1 diabetes research.

How to enter the TCS London Marathon 

Apply for a charity place 

All of our charity places are now filled and we are no longer taking applications.

Please check back here from April to find out how you can get involved in the TCS London Marathon 2026.

Use your ballot place for the TCS London Marathon 

If you secure your ballot place through the race organisers, public ballot or your running club, we would be delighted to have you join our team. You will receive all the benefits of a charity place runner – with no minimum sponsorship requirement! Fill out our ballot place form today. 

Why join Team Breakthrough T1D?

Our support includes: 

  • Dedicated support from our friendly Events team, including regular catch-up with training and fundraising tips.
  • Ongoing support with your training and invites to a variety of in-person and virtual events. 
  • A Breakthrough T1D running vest with iron-on letters for your chosen name (once you reach £100 towards your sponsorship target).
  • Cheering materials for your family and friends.
  • Team photo on the morning of the marathon in Greenwich Park. 
  • Fantastic support from our cheer point on route.
  • A well-deserved post-race reception which includes a free massage to ease those weary legs, food to recover and a glass of fizz to celebrate. 
  • A private Facebook group and Strava club for all #TeamBreakthroughT1D fundraisers.

Get in touch 

For more information, or if you have any questions, email londonmarathon@breakthrought1d.org.uk.

FAQs

Other useful information

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Breakthrough T1D UK fundraising guide front cover of a man laughing while being sprayed with paint

Fundraising resources

From paper sponsorship forms, to fundraising posters and bunting, we've got everything you need to make your fundraising a success.

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Three young people jogging in Breakthrough T1D running vests in the park

Meet your fellow runners

Keep up to date with event information, share your reasons for taking part and meet fellow runners ahead of event day in our dedicated Facebook group.

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Six people in Breakthrough T1D T-shirts in circle from below, looking down at camera

Volunteer

Join our incredible team of volunteers and help out at an event. We have plenty of roles available – there will be something for everyone.

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