You absolutely cannot make any sweeping statements about education in the UK if you weren’t even aware that the Scottish Education system is a reserved matter and is an entirely different system from England and Wales.
Looking at the statistics you provided. “UK” ranked 12 in 2024 and are now 16th in the WTO.nIn 2024 (and for at least 5 years prior) UK ranked 2nd in the USN data, in 2026, they are 6th. I have no idea how these ranking are comparable given Slovenia scores better than we do in WTO, despite being among the lowest in USN .
Setting aside how difficult it is to combine the 4 nations in to one ranking given their different systems, I think it’s fair to say that such a drop in standards is unlikely to be happening in a single year and is likely that the chronic underfunding and the failures in ASN education, pushing more kids to mainstream when they can’t cope with it that has happened over the last decade is what brought us to where we are.
The world university rankings are meaningless. The vast majority of young people going to universities in the U.K. are not going to the handful of prestigious schools on the list, they are going to the other 160 universities, which are ranked way down the list. Again this is due to chronic underfunding. In Scotland for example, funding of university places for Scottish students has fallen by more than 50% in real terms over the last decade.
There is much to be proud of in our education system, but complacency and a lack of prioritisation means we are seeing problems in the system. It also doesn’t matter where we rank in the world when there are large numbers of children being failed by the system. Recognising problems is the first step to fixing them.