Were demographically and geographically completely different. Our population is much denser, more like a populous US state than a sprawling continental giant. People used to compare virus control in the US to places like Singapore and New Zealand, as though their ability to control the virus has any lessons that are realistically applicable.
We were hammered early on because we are very highly connected with the rest of the world. London is very international, and Heathrow is one of the busiest airports in the world, out of proportion to our population size. We were always going to take a heavy hit.
Nevertheless as soon as vaccines became available we have had broad adoption, and ever since we've been reaping the rewards. Delta arrived here early, but by then our vaccine take up was enough that it didn't really make as much of an impact on us as it has elsewhere.
It's just amazing to me that in 2021 here on HN the fact that vaccines protect against viruses is an actual question, or in any way political.