From GOV.UK

(https://coronavirus.data.gov.uk/details/vaccinations?areaType=nation&areaName=England)

Vaccinations in England.

For English areas, the denominator is the number of people aged 12 and over on the National Immunisation Management Service (NIMS) database.

Vaccination uptake, by vaccination date age demographics:
Feb 2022 - First Dose:

18-24 = 68.1%
25-29 = 65%
30-34 = 66.9%
35-39 = 70.2%

This matches, pretty much perfectly with the data I presented in my previous post, which was based on

The total number of person-years (based on the population size of the 2021 census)

Minus

The number of vaccinated person-years (all cohorts).

The ONS data that purports to show non-vaccinated people dying at higher rates of non-Covid causes is short by 2,457,293 (of 18-39 year-olds in England), and shows an unvaccinated rate of 18.3% when according to GOV.UK, the unvaccinated rate is between 30 - 35%.

Once again, please check my workings.

And please give more information about 'excluded regions ... with no good population estimate'. I appreciate it might be impossible to achieve 100% confidence in stats related to population sizes, but - for all its failings - we are talking about a highly-developed first world country - not a hard-to-track Amazon tribe.