Dolly and fainting Lewis

Lewis and I went to give blood this evening and he fainted, I can't take him anywhere! He was okay after a lie down, actually two as they made him lie back down again after he got up, he was very pale! They've now said he won't be allowed to donate again as this is not the first time its happened, best to be on the safe side but a bit of a shame as he has donated several times without issue! I managed to donate fine, it's the first time since i was anaemic last year, so I was pleased to be able to give again! My blood group is A- which is relatively uncommon and it's quite low stock at the moment too!