It's also not the only stat that looks bad. Foreign direct investment, for instance, fell off a cliff. Exports have basically plateaued, probably because it's actually really difficult to get things in and out of the EU now.
On a more fundamental level, leaving the single market is essentially declaring a trade war on your own economy. It's never going to be a good economic proposition, and the hard brexit we've ended up makes it pretty onerous to do anything over EU/UK borders.
[0]: https://uk.news.yahoo.com/uk-inflation-compare-european-coun...
Inflation is only part of the problem. The economy is not in a great shape overall. And the forecasts are terrible. If you read a bit more on what the BoE says, you’ll see there is more to it than the sound bites you get from politicians. Also, Labour is lucky not to be in power right now, but they will still have to do the thankless, dirty work when they get their majority. Expect some vocal disappointment in the near future.
For context, whilst the BoE forecasts the longest recession ever in the UK, the ECB adjusted its forecasts for 2022 to 4% and 2023 to 2.7%. The British economy really is not behaving like the EU’s.
Things had started to change beforehand as various actors tried to adapt before the shit hit the fan, but yeah, the effects were not being felt that much, on account of the thing not having actually started yet.
Eurozone inflation in September: 9.9%
I've seen some wild claims circulating that, for example, 80% of the UK's inflation is caused by Brexit but those don't seem at all plausible. No EU member has inflation that low, France's is about the lowest at 6.2% and that's with some fairly substantial and expensive energy price subsidies keeping it down. In fact I don't think there's any country in the developed world with inflation as low as that would imply the UK's should be if not for Brexit.