I see that Swiney says that the law is crystal clear on single sex spaces, but that employers can choose to ignore it, if they wish. That's quite the oxymoron, isn't it?
By his standards, I (an occasional employer) can choose to ignore the Offences Against the Person Act and slap his fat jowls. Or the Road Traffic Act and run him over on the pavement.
He'd have no grounds to object, would he,
(Note to MNHQ - I am not being serious and would not do that, nor incite another to do so, I am merely pointing out the irony of him disregarding one law, but, doubtless, expecting everyone to abide by the law in general).