If poor nutrition is the cause (not obviously the case) then it's fair to say our diet in the UK is not so far behind the USA in terms of the availability of unhealthy foods. We maybe eat a bit less of it, but we have rising obesity levels. We don't have anywhere near the same number of morbidly obese or super-obese people, but towards the merely very overweight end of the scale we've probably caught up.

Probably catching more cases in screening, though.

There is an obvious factor for cases in 2023, which is that a lot of backlogged cases from 2021 and 2022 will be turning up, and the mere presence of a backlog means delayed diagnosis of newer cases. Even if COVID itself doesn't cause cancers or make them worse (and that's being studied), the pandemic did.