The UK has only just started vaccinating under-18s, who make up a significant chunk of the population, and they are not vaccinating anyone under 16 yet. This is going to skew the numbers a bit. Among older age groups the numbers get up into the 80s and 90s.

We are also lagging among BAME groups and in certain economically deprived areas. If you are a white 75 year-old in Wimbledon the odds that you are vaccinated are around 95%, while if you are a 30 year-old Pakistani immigrant in Bradford then I would put the odds closer to 50%. Still a long way to go, but constantly improving.