cvd - UK needs 85 per cent vaccinations.

Comparing the vaccine take-up for both doses by age cohorts, from Jan 2021 to June 2021.
Something in excess of 85% of adults need to be double-jabbed to achieve approaching herd immunity.
Bear in mind that the younger age groups have had less time to get vaccinated, although the first dose uptick from mid-June - as appointments etc were opened up to all adults - is very noticeable.

Not my Image : Fair Use & public information