Working threatening to fire unless I go in

Hi,

I have been working from home since around 2020 due to Covid, though before that  I was already trying to request to work from home as I was having shutdowns in work. I had an occupational health assessment done where they said I should continue to work from home unless it was essential to go back into the office. Now however my work have declared despite everybody working 2 days a week from home that it is essential I go back in, and when I asked why they gave reason such as "to watch management to learn good behaviours" and "so when training people you can see their reactions to before understand if they are getting it".

I tried to explain that basically all their reasons are things that as an autistic person I can't do and that it shows a complete lack of understand of my disability, but they refuse to discuss it further and are now just saying "you are not in a position of power" and implying I will lose my job if I don't go in due to being put on a PIP.

Does anybody have any advice on how legal this is or if I will just need to look for other jobs while suffering probably daily shutdown / meltdowns? I'm honestly scared at this point, I had a discussion yesterday which resulted in a meltdown and curling into a ball for 2 hours, and they have said they are booking in something else for today and need to organise an "in person meeting" to prevent things "getting worse".

Is this legal? does autism have so little protection that you are forced to just have daily meltdowns if thats what an employer demands?