What is Gift Aid?

A gift-aidable donation is a donation [made to a bone-fide charity] that has had tax deducted from it. This tax can be reclaimed and used as an additional source of income for account holders to distribute to charities.

If you give donations to charities and have paid tax on that income and you do not claim gift-aid back then you are throwing away 25p for every £1.00 donated.