Yes, this is correct. I give £1,000 to charity and gain £190 in tax relief. I do not gain £190, I have still given away £1,000 against keeping £810 for myself.

Yes, this is correct. I give £1,000 to charity and gain £190 in tax relief. I do not gain £190, I have still given away £1,000 against keeping £810 for myself. This is a scam?