MichaelC, there is an enormous amount of missing detail in your post, to put it kindly.
For those who may not know, Gateshead is quite unique.
It has a population of a few hundred families, close to a thousand seminary girls, and almost as many yeshiva bochurim
Add to that the fact that there is only one main street with only two small kosher stores, it’s patently obvious why you need different hours for bochurim and girls.
(my stats may be out somewhat – I’ve been away a few years – but that’s the basic picture)