If you Gift Aid, the charity can claim back the tax paid at basic rate. If you're a higher rate tax payer, you can claim back the difference between the tax you've paid and the tax the charity can reclaim.
https://www.gov.uk/donating-to-charity/gift-aid
@jsabine started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
If you Gift Aid, the charity can claim back the tax paid at basic rate. If you're a higher rate tax payer, you can claim back the difference between the tax you've paid and the tax the charity can reclaim.
https://www.gov.uk/donating-to-charity/gift-aid