Says Igor Chudov here.

Excerpts:

I am very sorry that the ONS used incorrect counts of unvaccinated people. Fortunately, we can correct them using publicly available, official UK data.

Such corrected counts of unvaccinated people lead to a much more realistic comparison of mortality between boosted and unvaccinated people, consistent with our observations of overall excess mortality in the UK.

This is NOT a harmless mistake. Undercounting unvaccinated people will distract the public from looking at the real cause of excess mortality because ONS numbers falsely suggest that the boosted people experience lower excess mortality than the unvaccinated.

The opposite is likely true: as I have shown, the boosted people have higher excess mortality. Furthermore, corrected mortality explains the 20% or so excess mortality the UK experienced in December.