It’s worth asking your local library. My library card gives me read-only access to every ISO standard I’ve ever needed.

There’s also the Estonian standards institute which offers the same standards for much much cheaper.

I love to criticise the government, I do it quite a lot. But one thing the UK gov does really, really incredibly well is its website. The gov.uk pages are one of the most intuitive and informative things to browse on the internet. It really is excellent AS IT IS. It ain’t broke is what I’m saying.
So on top of all the very valid concerns about AI accessing the information of i.e. desperate citizens looking for legal help in dire, highly private circumstances, I’ll be mourning the loss of a formerly excellent resource.