I believe a lot of places in Europe have the same school requirements as well.I'm sure one of the reasons that some people won't have it is because this I think is the first time in the UK that people have faced restrictions as a result of not having a particular vaccine. Whereas I believe in some places e.g. parts of the US, you need proof of childhood vaccinations before starting school? That's just not a concept here and people can't seem to face up to it.
I'm sure some of them will change their tune if their preferred holiday destinations make it mandatory
They were talking about introducing it here a few years ago (before covid) but there is now an anti vaccine mandate wing ij politics who would object to it when they might not have before.