When I was younger I gave blood twice a year as the blood wagon came to work and did it there. Then I moved companies, got out of the habit and never got in to it again. I re-registered three years ago and trying to get an appointment was so difficult I gave up. Got and email from Blood.UK the other week, saying that the wagon was coming through and to book an appointment, and I managed to get one, so going next week and hope that it will be the start of a regular thing.
That is very similar to my experience
the local blood centre used to have an arrangement with out company
and one afternoon we were allowed to go there at any time of the day and donate - then walk back to the office
all in office time
so a lot of us did that
Then the blood people cancelled that arrangement
and we had to make a specific appointment and when I tried it was in x months time
so I stopped
started again after a while but it was a pain getting an appointment when I could go so I stopped
tried to start again some year ago
tried several times but the appointments were in 6-12 months time unless I went into Liverpool centre
kept trying every few months and after a few years got an appointment
they said my iron levels were too low and the GP put me on iron tabletes and said that'll do it
went back after 6 months on them and got kicked out again for low iron
just as well really - they said it was the lowest level they had seen!
so teh GP started a raft of test and after severl goes diagnose Coeliac disease
but the difficulty in getting an appointment locally within a reasonable time frame gave the impression they are not really bothered