With Gift Aid, your generous donation of £10 would be worth £12.50 at no extra cost to you.
I am a UK taxpayer and I understand that if I pay less Income and /or Capital Gains Tax than the amount of Gift Aid claimed on all my donations in the relevant tax year, it is my responsibility to pay any difference.
Pre-exposure prophylaxis involves people who do not have HIV taking antiretroviral drugs when they are at risk of exposure to HIV in order to prevent infection. The drugs are usually taken as pills (oral PrEP).