
The Big Half
Run for charity Sight Research UK at this year’s Big Half on 6 September 2026.
Multiple charity slots still up for grabs at this year’s Big Half!
We have multiple slots available at the Big Half in London this year for runners wanting to make a difference and raise vital funds for sight-saving research! Register your interest to run for Sight Research UK before midnight on Monday 2 March 2026 for the chance to be selected.
The Details:
The Big Half is a vibrant and inclusive half marathon with a fun and festive atmosphere. This is an incredible opportunity for runners at all levels and abilities to run part of the iconic London Marathon course on behalf of Sight Research UK.
When?
Sunday 6 September 2026
Where?
Tower Bridge, London (starting point)
Distance?
Half marathon. 13.1 miles / 21.1 km

How do I secure a charity slot?
Sight Research UK has multiple charity slots available, but these are highly competitive. Individuals will be selected depending on the answers they provide in the Expression of Interest form, which closes to applications at midnight on Monday 2 March.
General places at the coveted Big Half event have already sold out unless you elect to run for a charity.
If selected and you agree to represent Sight Research UK, you’ll need to:
- Pay the £20 registration fee
- Commit to a fundraising target of £350
Complete the Expression of Interest form before the deadline for the chance to secure your space at the Big Half 2026!
Join Team Sight Research UK to make a difference today.
Already have a place at the Big Half?
You can still fundraise for Sight Research UK if you’ve secured a general entry slot at the Big Half. There’s no entry fee and no fundraising goal if you would like to support sight-saving research as a non-charity entrant.
Just let us know so we can support you along your fundraising journey by emailing hello@sightresearchuk.org.
If you want to stay in the loop about future events (like the Big Half) where you can make a difference, sign up to our newsletter:

