If only @Conxis
In terms of the Hall there’s a capacity of 1948 people
According to research stats women visit events/ theatres at a capacity of 62%
Again according to stats women spend 90 seconds using a toilet ( not allowing for hand washing, periods etc ) Men take 60 seconds.
If everyone uses the toilet in a 30 minute interval ( I’m aware some are 20 minutes and also not everyone uses the toilet but apparently most do, just in case ) that means
Women need 110 toilets and
Men need a combined 34 toilets / urinals (both allowing for time to get to toilets )
That brings the level to just over 13 conveniences / head.
Interestingly this is approximately the same % that the National Theatre and Royal Court provide which are regarded as one of the better provisions in the country
If the Barbican use the BS standards for provision those numbers would nearly half which is one of the reasons why there’s always a queue for the ladies!
So that’s 144 conveniences in total ( based on usage capacity and time ) plus accessible toilets for the hall. If provided this would be sufficient for the adjacent theatre as well as the capacity is smaller and assuming both venues don’t have an interval at the same time.
So clearly the Barbican is under providing
They will say they can’t provide enough because the building is listed. However it’s Grade II listed, not I or II star, so they can in fact provide for single sex toilets without compromising the integrity of the building.
Of note Single sex and accessible toilets come first as a priority in the building regs with provision for Unisex after.
Any venue providing facilities in accordance with the British Standards is complying and couldn’t be taken to court, even though the standards are woefully lacking. We would therefore have to challenge the Standards