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TCS London Marathon 2023

We are thrilled to announce that applications are open to secure one of our charity places to run the 2023 TCS London Marathon on Sunday 23 April 2023.

Are you ready to be part of the UK’s largest marathon, and one of the incredible six World Marathon Majors?

Run from Tower Bridge, to Canary Wharf, and finish along the mall with half a million people cheering you on. There’s no event quite like the TCS London Marathon.

Register your interest

Key Facts

Event Date
23 April 2023
Registration Fee
£50 (once your place is confirmed)
Minimum sponsorship amount
Deadline for applications

Get inspired for 2023, see what past #teamICR runners have got up to:


Why join #teamICR?

The vital funds that you raise by running with #teamICR will help us deliver our innovative programme of cancer research. Together we can reach the finishing line.

Find out more about how our appeals for cancer research help patients live well with cancer.

What to expect from Team ICR

Regardless of the place you hold, we promise to support you all the way and get you to the finish line. We’ll be on hand to support you each step of the way. As part of #teamICR, you will receive:

  • An ICR running vest or technical t-shirt
  • A fundraising pack with tips on reaching your target
  • Advice on training, nutrition and health
  • ICR branded materials to support your fundraising
  • Support from our dedicated events team throughout your training
  • Lively and enthusiastic encouragement from our cheer squad on the day 

How to join our team

If you would like to join our 2023 team, please register your interest on this form. All applications received will go through a review process and we hope to be able to confirm places as soon as possible, to give you plenty of time to train!

There is a fundraising minimum ask of £2000. Please do let us know your fundraising plans when you signup to give us the best chance to support you.

If you have secured your own place directly through the organisers, we would love you to join our team. Please get in touch to let us know you have secured your place and submit a copy of the event entry. You will receive the same support and we just ask that you raise as much as you can.

2023 Ballot

The ballot for the 2022 TCS London Marathon has now closed and results for 2023 have now been announced.

Stay in touch

Get in touch with us on 020 7153 5307 or email [email protected].

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We’re lucky to have fantastic supporters helping us make the discoveries that will defeat cancer. Read some of their stories below.

Inspirational young woman smashes target of raising £21K for the ICR before 21st birthday

A determined young woman from Southend-on-Sea has smashed her goal of raising £21,000 for cancer research before her 21st birthday this week.

Find out more

Abbie’s Army join #teamICR for the London Marathon

This year, a team of three runners will be taking on the London Marathon for Abbie’s Army to raise money for childhood brain tumour research at The Institute of Cancer Research.

Find out more

Joining #teamICR has motivated James through his training for the London Marathon

James Fuller will be running the Virgin Money London Marathon with his team mates in honour of his mother in law who passed away from ovarian cancer last June.

Find out more

Caroline trains for the London Marathon to regain her fitness following cancer treatment

Caroline Kingsbury-Margetts has donned her running shoes to raise money for cancer research and regain her fitness following treatment for cervical cancer.

Find out more