Incidentally Candelle I'm the person who couldn't have my vaccine on a Saturday morning. No, I couldn't have my vaccine at the beginning, middle or end of the session. I'm self-employed and work most of the day. I lose money if I don't work and, as I'm already living on the breadline, it's a significant loss of money. I don't have an employer! And I find your "advice" extremely patronising.
My local walk-in centre is closed at lunch-time (I don't take a lunch break anyway). The site itself warns people that there will be last minute changes in opening times, closures if they run out and advises people that there could be long queues and to take something to eat and drink and keep warm. It's not just a question of taking an hour off work. There will be many other people in the same situation and/or have to arrange public transport or lifts. I would have to cancel a whole day's work to be sure that I would have enough time.
Interestingly, the site has now been updated to give more information and advises people to use the national booking system when it's been 182 since their last dose. That's what I'll do, but the information only appeared yesterday, when the date stamp on the website says it was updated.
I become eligible to book next week and I'm happy with that, but the information wasn't available when I posted.
PS. I always take a great deal of responsibility for my own health, which is probably just as well in the current circumstances. 