A photo of London with the sky reflecting on the water.

Run

The Big Half 2025

Date and Time info: 7/09/2025
Location: London
Registration fee: £35
Fundraising target: £500
Face-to-face

The Big Halfis a vibrant, inclusive half marathon with a fun, festival atmosphere and the 13.1 mile course weaves through London from Tower Bridge to the iconic Cutty Sark in Greenwich. Fancy taking on a race for Retina UK in 2025? We’d love to hear from you.

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Support for you

As a part of Team Retina UK you’ll get:

Help and guidance from a dedicated member of our Fundraising team
Access to a range of materials to help with your fundraising – including sponsor forms, collection tins, pin badges and more
A Retina UK running vest
Invitation to join our Strava running club where you can chat with other Retina UK runners, sharing tips and advice
Finisher t-shirt and medal from the race organisers.

Charity place

Secure your place in the race with a £35 registration fee and pledge to raise £500 for Retina UK.

“Retina UK gave me the best support after my diagnosis. The support, patience, empathy, kindness and understanding I received from helpline staff is one of the main reasons I came to terms with my diagnosis.”

A community member.

Own place

If you've already secured your own place, we’d love for you to join our team.

Email us

Any questions?

If you’d like more information on joining our team, please contact our Fundraising team on 01280 821334 or email Fundraising@RetinaUK.org.uk.

The Big Half 2025

Entry - The Big Half 2025(Required)

Price:

Name(Required)

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Street Address Address Line 2 City County Postcode

Participant details:

Contact phone number(Required)

Date of birth(Required)

Running vest size(Required)

Instagram username(Required)

Do you have a guide runner?

Yes

How did you hear about the event?(Required)

Terms and conditions

By accepting a charity place from Retina UK I agree that:

Consent(Required)

Charity place

In addition to registration with Retina UK, I understand that I am required to confirm my registration with the event organiser (including agreeing to the event organiser’s terms and conditions) in line with information provided by Retina UK and that failure to do this may result in my place being lost.

I acknowledge that I have provided data about myself in order to register with Retina UK for this event and that Retina UK will need to pass this information to the event organiser to register my place. For this event, Retina UK works with a third party company, The Big Half, who process the registration of charity places.

Registration for this event includes the payment of a non-refundable registration fee of £35.

Any charity place allocated to me is non-transferable and any attempt to transfer my place to another person may result in the place being withdrawn.

The event

All runners take part at their own risk.

I understand that I am taking part in an event that is not organised by Retina UK and that Retina UK accepts no liability with respect to my participation.

I will be aged 18 or over on the date of the event.

If I am unable to take part in the event, I will inform Retina UK immediately.

I give permission to Retina UK to use any photographs/videos taken of me to raise awareness and/or money for its work and/or events.

I understand that Retina UK will contact me via telephone, letter or email for any matter relating to my fundraising and my participation in the event.

Fundraising

I understand that event places have an associated cost to Retina UK and commit to raising a minimum of £500 (excluding Gift Aid and any registration fee paid) for Retina UK.

I commit to raising £400 (80% of the minimum fundraising target) by the date of the event and the remaining amount no later than six weeks after the event date).

Medical history and fitness confirmation

A half marathon is a strenuous activity and the decision to run one should not be taken lightly. If you have any medical conditions that could be adversely affected by exercise or if you are in any doubt about your health, you must seek advice from your doctor.

I confirm that to the best of my knowledge my general state of health and fitness is good and I take full responsibility for myself.

I agree to the terms and conditions

I do not wish to receive communications from Retina UK:

By telephone

By post

If you already hear from us, we will continue to contact you in the same way. If you don’t already hear from us, we’d like to send you information in the post and/or over the telephone about events, research, fundraising, appeals and our regular newsletters & updates.

It’s often cheaper for us to contact you via email or SMS (text message) – please tick the boxes below if you’re happy for us to contact you in this way:

Text

Your privacy is our priority. We promise to keep your details safe and will never sell them. Just for your information we use an email broadcast company based in the USA. Would you like to know more? our privacy policy explains all: RetinaUK.org.uk/privacy-policy.

If you would like to change the way you hear from us, how we use your information or do not want to receive and further communications from us, just email info@RetinaUK.org.uk, call 01280 821334 or write to us at Retina UK, Whiteleaf Business Centre, 11 Little Balmer, Buckingham MK18 1TF.

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Support for you

Charity place

Own place

Any questions?

The Big Half 2025

Participant details:

Terms and conditions

Charity place

The event

Fundraising

Medical history and fitness confirmation

Debit / Credit card details