Didn’t time it unfortunately, but a few years ago I battered upto the local donation session on my bike, and as it was quiet went pretty much straight through and got linked up. There wasn’t much preamble in those days.
Buy the time the nurse had finished taking another’s needle out and putting the plaster on, my bag was nearly bursting at the seams 😀 When I got the “you’re not going to do anything strenuous for the rest of the day” question, got a black look for telling her I was going to race my bike home, have tea then go down the pub for a few pints.