@Howseitgoin the only ‘advantage’ gender neutral/ mixed sex toilets have got going for them at work is increased visual and audible privacy. Forget the ‘lockable’ that is irrelevant.
This is not the same as safety. Total privacy also reduces hygiene aspects due to reduced ventilation and ability to clean means you are more likely to inhale and ingest pathogens.
In terms of total risk you are much more likely to die a preventable death anywhere if you are on your own. When you are ill you go to the toilet. You are more likely to be really ill on the toilet than anywhere else at work. You are also more likely to be seriously ill while straining as it puts pressure on the heart, especially when people hold their breath. 11% of people having cardiac arrests have them on the loo. There are millions of people with heart conditions - the figure is growing and many don’t even realise. There is a case for reasonable adjustments for toilet design not being private for people with invisible disabilities like diabetes or epilepsy. Keeping people safe.
Paramedics will say the area they find people is where there’s a toilet (at home and at work). The biggest call out that London fire brigade has is for collapsed people behind locked doors.
The best way to increase safety and health in a public or work toilet is for you not to be in private but semi private.
The door needs to be able to be unlocked quickly from the outside and have the ability to be pulled outwards because bodies prevent access otherwise. But crucially you need to know asap that the person has collapsed. Every minute reduces the chance of someone surviving.
The reason single sex toilets designs are safer, as pp have said, it that the area in front of the toilets is single sex too. If it isn’t the toilet design is private because of voyeurism and discomfort.
I have done a lot of research on school toilets. The current designs are based on privacy. There’s reports of more sex in toilets, more dirt, more vandalism. There have been deaths too.
Workplace sex happens in toilets that are private (even at the BBC according to Rod Liddell). It can be sex without consent too.
Have a look at this picture. The left is a single sex design. It can only be a single sex design in the UK. If there’s any ambiguity they are private.
The most vulnerable people at work are the ones that benefit most from toilets being single sex designs. That’s anyone collapsed (or being assaulted) that needs help.
In which toilet design would you rather be at your most vulnerable? If you choose left that means in the U.K. and it’s a single sex toilet with a single sex area in front.