I work in the HoC and this doesn't surprise me at all.
Years ago I raised the points that their gender ID policies were going beyond the scope of the law and basically got told it wasn't going to change.
Their workplace equality networks were allowed to actively promote Stonewalls position despite the requirement that the institution of parliament and employees need to remain politically neutral.
Their inclusion and diversity training (which all staff were required to take) incorrectly listed gender as a protected characteristic and gave an example of challenging a transwoman in a toilet as discrimination.
I raised this with the union but, whilst I think the training is now correct, I'm not under the illusion it was done to ensure women's rights were protected.
So we have a culture where for the last decade the policy of self-id has ruled and the silencing of staff when this was objected to.
Senior leaders are now tying themselves in knots and are terrified of making a decision (hence referral to EHRC guidance).