The obsession with converting toilet designs to a free for all has been flouting building regulations, which are founded on health and safety. This has led to a decline in health and safety, particularly for women and children and those having medical emergencies.
For those planning refurbishments in England:
This section deals with requirement Tl from Part T of Schedule 1 to the Building Regulations 2010.
Requirement
Toilet accommodation
T1. (1) Toilet accommodation in buildings other than dwellings
(a) must consist of
(i) reasonable provision for male and female single-sex toilets, or
(i) where space precludes provision of single-sex toilets, universal toilets, and
(b) may consist of universal toilets in addition to single-sex toilets.
(2) In this requirement—
"single-sex toilet" means toilet facilities which
(a) are intended for the exclusive use of persons of the same sex, and
(b) provide washbasins and hand-drying facilities in
(i) either the toilet room or cubicle, or
(i) a separate area intended for use only by persons of that sex.
"universal toilet" means toilet facilities which—
(a) are provided in a fully enclosed room which contains a water closet and washbasin and hand-drying facilities, and
(b) is intended for individual use by persons of either sex.
Caveat: of course there are certain exemptions (schools mainly), so take further advice.