Donate tax-exempt у Великій Британії
These Great Britain non-profit organizations help Ukraine. All of them are tax exempt, so donations can be tax deductible for donors at the moment of writing this article.
You may check them here https://register-of-charities.charitycommission.gov.uk/en/charity-search by name or Charity number provided in parentheses after each link, also you can read https://www.gov.uk/donating-to-charity article for general rules about donations.
You are welcome to make tax-deductible donation to support Ukraine using any of them.
https://british-ukrainianaid.org/ (1164472) - British-Ukrainian Aid: vehicles to save lives on the frontline, medical equipment, children and displaced persons.
https://www.hospitallers.org.uk/ (1200534) - Hospitallers: ambulances, animals, medical equipment.