Find out how to take on the TCS London Marathon for charity 
London Marathon Events head office

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Need help?

If you have a question about the TCS London Marathon, take a look at our hot topics below to find instant answers to our most common and current queries.

Hot topics

Updating details

We will email all participants by the end of Friday 16 February with the opportunity to review your dtails and update where required. Please check your junk/spam folder if this email is not showing in your inbox and only contact us if this hasn’t been received after Friday 16 February. Tip: You can also update your details via your confirmation email received when you entered.

What happens if I am unable to take part?

If you are no longer able to take part on Sunday 21 April, further information on withdrawals and deferrals will be emailed to participants by the end of February.

Please take a look at our Deferred Entry page for details on which types of entry are eligible for deferral. 

Start details & Event Guide

We will email all participants with their specific start details and the Event Guide with everything you need to know for Event Day, by Wednesday 3 April.


Still need help?

If the above hot topics do not answer your question, our FAQs page is a great place to find instant answers to some of our other most common enquiries.

If you’ve read our FAQs and still need our help, you can fill out our contact form. Please only contact us once as multiple enquiries can slow down our response time.