It occurs to me, in light of the ongoing slow-mo fall of Stonewall, that many organisations have been using their materials and ideology in training their staff for years. Their take on the law has been routine, reproduced in internal training materials, repeated so often it becomes unquestioned.
There are thousands of line managers who think the stubbly new recruit is entitled to use the ladies' facilities on a self-ID basis. They've been told repeatedly by an authority invited by their employer that this is the law, to do otherwise would be to invite a discrimination claim, and who's got time to sit and pore over the statute books and verify information when you've got 15 1:1s and your own performance review to prep for on top of your day job.
I think as well as getting this unlawful misinformation out of workplaces, schools and universities, making available some refresher training on what the EA2010 actually says would be beneficial - perhaps as part of a wider 'deconditioning' of factually-dubious material pushing a particular agenda. By this I mean less controversial social theories without context, no fad theories or management/psychology pseudoscience (unconscious bias / emotional intelligence) being presented as scientific fact, no lobby groups, everything evidence-based with direct references to the law / research.
I wonder how this could be pulled together and made palatable for employers. A credible organisation would need to deliver it. They're not going to buy anything adversarial or overtly anti-SW (who have done a lot of good pre-2015) - but I think just quietly doing away with Stonewall law will not be enough.
People do need to know about equality law and they've been misdirected, that needs actively putting right, not just leaving to fester.