If you read the article you'd be aware that that isn't true and is in fact a key point of the argument.

To summarise:

The UK was trans-inclusive from the late 2000s-ish to about 6 years ago. At that point it started slowly backsliding under the Tories. Then suddenly in the past year or two trans rights have been eroded massively (including through the first veto of a Scottish bill since devolution). Legal precedents have been reinterpreted.

It's a violent lurch towards the direction the US went down. And if it can happen to trans rights it can expand to other areas.

And to add my own bit at the end:

Reform are testing the waters with things like "abortion is murder". The government is heavily policing protests. The election system sucks. I think caution is warranted, this is not what a healthy democracy looks like.