The actual population (including the undocumented immigrants, visa over-stayers, student, workers on temporary visas etcetc )of the UK is somewhere between 82 and 85 million (!).reportage published in many national and local papers at the same time:
"At the moment, 33 million Brits have received two doses of a coronavirus vaccine, meaning 49.6 per cent of the population is now fully vaccinated, while almost 78 million have received one dose."
Wearing face masks and social distancing could remain part of life for the next five years, under contingency plans being drawn up by the government.www.yorkshireeveningpost.co.uk
so 33M = roughly 50% of official 66M population... but 78M are vaccinated? "Shumthing doeshen't make shenshe here..."
*(Caveat: Even though I believe there is a 70 million plus population - 78 million vaccinated?)
This calculation is based on overall grocery sales in the UK.
people all live outside the system still have to eat thus to be difficult to fake such statistic.