Exactly the same thing happening at my son's schools.
No consultation with parents. The only comms sent out were a paragraph in a newsletter 3 days before they broke up for the summer.
Apparently they did consult the pupils (who were all wildly excited for it) I pointed out that unless it was an anonymous consultation and everyone was asked, it was worthless.
Same format, cubicles with toilets, communal sinks, open to the corridoor. It is being converted from a single sex (boys and girls) block not in addition to the existing provision, but other single sex provision remains elsewhere.
Almost like there is a centralised plan and funding coming from somewhere.
I challenged it on the basis of part 2:
SPRs Regulation 4 — (1) Subject to paragraph (3), suitable toilet and washing
facilities must be provided for the sole use of pupils.
(2) Separate toilet facilities for boys and girls aged 8 years or over must be provided except where the toilet facility is provided in a room that can be secured from the inside and that is intended for use by one pupil at a time.
but was told that because there is single sex provision elsewhere this criteria was met.
I said I didn't think that was the spirit of the law, but fair enough and asked the head, if he could reassure me that there would be no further erosion of single sex provision, (that any new mixed sex facilities would be in addition to not in place of single sex toilets) and was told no, that couldn't be promised.