Is it just me or the UK has been losing its moral highground over the years?
I doubt that any nation has an unchallengeable claim to "moral highground".
However, if the UK had any plausible claim to leadership in democracy, education, or public policy, we can consider the Online Safety Act to be the formal end.
A bill said "to protect children" presented with a language for children.
Ever since about 1215, I'd say