There is no evidence that this change is needed
Not true. See: single sex wards, prisons debacle, fitting rooms, Girl Guides, the big question mark hanging over trans-identified females' rights to maternity leave. I could go on.
We understand this advice has no legal standing
So you can just say what you like then, without having to be accountable. Brilliant.
The advice as sought by the Government, if enacted, could significantly set back our hard-won equality gains. It would mean that trans women would not be entitled to make equal pay claims, use appropriate toilets in the workplace, or make sex discrimination claims
Not true. And see above about trans-identified females' rights. Do they not count?
This would remove the ability of trans people to gain legal recognition of their gender identity.
False. We don't have "legal recognition of gender identity".
One in four British people is close to a trans person.
What data supports this statement?
It is crucial that trans and non-binary people continue to be protected at work and beyond
There are no protections in the event you call yourself "non-binary". It does not exist.