Well nearly didn't bother replying to you. But its simple really, at the time, AZ were more open on giving data on there vaccine, Pfizer not. So booked my appointment, got there, and before they started asking me the basic questions, I said before I waste your time what vaccine will you be giving me, they replied AZ. AZ were more open on the delayed second dose. If they try and give me a different one on the 3rd of May I shall refuse it, but thats just me, what others do is up to them.