Gender instead of sex in work diversity training

I did at my work. We were discussing the policy and I asked how we could be trusted to get it right when we can't even get the basics right and pointed it out. Cue some disbelief and a googling in the equalities act and it was amended. Even managed to get in some sex vs gender talk.

I would send a brief, neutral email to the organiser stating you're very interested in diversity, and wanted to check if it should be sex rather than gender, as per the EA 2010.

I did this recently, and it was corrected with no quibbling; I think the faleshood that they're synonymous is so deeply engrained many people don't even think about it.

If they insist gender does trump sex (ie that work policies are above the law of the land), then you'll need to be careful.

Yes I have in a work policy. I just said I'd noted that they'd used gender instead of sex; explained it isn't the same thing but it's obviously easy to get confused, but as its not the wording in the equality act they'll need to change it so it's legally compliant.

I was surprised how easy it was. They just changed it.

If the diversity training listed all of the other protected characteristics except sex, I'd probably send an mail to the training department, cc your line manager, stating your surprise that they missed out a whole legally-protected group, and concern at their 'mistake'. I'd finish by saying that you hope this is corrected ASAP.

Make yourself sound concerned that their silly mistake could get someone into hot water, or the company accused of discrimination.

That's the 'shot across the bow' and hopefully would be enough.