Oh, man, the UK was an absolute disaster for getting vaccinated. In 2021 in my area there were literally crowds of young people at "walk-in" vaccination centres getting turned away and being told to wait for another 1-2 months. Meanwhile about 3 elderly patients were getting the shot per hour and the Guildhall looked empty besides.
My friends in other countries were vaccinated months before me. Ended up getting all my boosters outside the UK because they couldn't give a fuck about anyone under 65.