I have now spoken several times to a referral doctor at the blood donation service - they have refused to let me donate, first because they said I might have received a blood transfusion during surgery (a no no for donating blood due to CJD risk) but I forwarded them a letter from the perfusionist to verify I had not - and then because they said having major heart surgery excluded me. I appealed and the doc took my 'case' to a panel of nine doctors who review these kinds of things to discuss yesterday. He phoned this morning to say that the rules have changed recently and anyone with a history of aortic stenosis, even from a congenital cause as in bicuspid aortic valve, is now no longer allowed to donate blood in the UK. They also consider that with me now having a 'foreign valve', even though the skin is cleaned very well before the donation needle is inserted, that there is a very slight risk of infection being introduced which could lead to endocarditis. The doctor spent a long time explaining things to me and will write a letter for my GP and cardiologist - he thanked me for my previous donations and thanked me for challenging the decision because they do like to review their policies