I've been using hostels and bunkhouses for 40-50 years, and based upon completing a feedback questionnaire and the request to complete 3 additional EDI questions I have just discovered that YHA (England and Wales) now ask about your gender identity...and when questioned about the situation they state that beds in dorms are based on gender identity not sex. I can't see where this is explicitly stated in their website.
Apparently they've responded to the EHRC consultation and are awaiting clarification before changing their current approach...
Have I been naive to not have realised female on their booking link does not mean biologically female?