I have to go back and read FWS again, then. From what I remember, a significant part of the reasoning in it to rule that sex referred to biological sex was that within itself the EA became a nonsense to interpret it any other way. That, essentially, the Act is riddled with use of the word man and woman in different contexts and only one interpretation consistently used could be correct. They painstakingly pointed out it’s only for the purpose of one Act - harmoniousness between different Acts isn’t a consideration (am I right?)
So the reasoning behind the reasoning in FWS is to look and see what interpretation of men/women makes best sense within the Health and Safety at Work Act 1974, the head legislation for the Workplace Regulations 1992, and all of its subsidiary regulations.
According to an AI search (don’t shoot me) the word woman doesn’t appear anywhere in the HSW Act.
But - it does appear in the Management of Health and Safety at Work Regulations 1999, also passed under HSWA, which includes
Risk assessment in respect of new or expectant mothers
16.—(1) Where—
(a)the persons working in an undertaking include women of child-bearing age; and
(b)…
I think it’s a good argument for self consistency that all regulations under the HSW use the same meaning of man or woman. If “men” included trans-identifying women they would be denied the protections provided by section 16 MHSWR. (Similarly to FWS arguments that precluded denying pregnancy discrimination protection to the same cohort).
OK - so now I am starting to be persuaded that the WR rules must take on a biological meaning.
(I’m sure sure BC is all over this, but if not, someone might want to point the MHSWR out to him).