In addition to everything else mentioned, the UK is also prioritizing first-doses while delaying the second dose far later than recommended (second dose at 12 w

In addition to everything else mentioned, the UK is also prioritizing first-doses while delaying the second dose far later than recommended (second dose at 12 weeks, instead of 3-4 weeks)[0]. That's on top of administering first doses without keeping a complete stockpile for second doses (ie, they are betting that it will be relatively easy to obtain a supply of second doses when the time comes). So yes, the UK is far ahead of most other countries in first doses administered, but they're also going off-book for their vaccination protocol in a lot of ways that make it a bad point of comparison for other countries which are following clinical recommendations more closely. [0] There's some clinical evidence in support of the 12-week gap for the AstraZeneca vaccine, though the UK made this decision before that study had been released, and there is not yet analogous data to support the efficacy of a 12-week period for the Pfizer and Moderna vaccines, which the UK is also administering on a 12-week gap.