of all organizations, you'd think the NHS would be the most likely to know the difference between male and female bodies and how important it is to differentiate by SEX, not gender.
Oh, they know the difference, don't worry.
Imagine that you are a doctor or nurse in A&E. There's been a car crash and a patient, who is not breathing, is rushed in. You need to know if they're a man or a woman so you know how much oxygen to inflate into their lungs. You need to know this because your medical training, and your professional experience, have taught you that men and women have very different lung capacities.
A life hangs in the balance and every second counts. You will not waste time clutching your precious rainbow lanyard and remembering that gender is an inner identity and nothing to do with biology. You KNOW that there is a difference between the sexes. You KNOW that there is a marked sex-based difference in lung capacity. So you ascertain the sex, and then you proceed to give the correct life-saving treatment.
Medical staff know the truth. They base treatments on the truth multiple times per day. The rest is just window dressing and idiotic posturing by non-clinical managerial staff.
The real issue is that the UK already has one of the highest tax spends per capita on the health service in the world and in return we get a shoddy service with poor outcomes. So why is money being spent on lanyards and training in a metaphysical belief that is not based in reality?