The headteacher and chair of governors of the primary school I work at (and that my kids go to) are both very keen on treating boys and girls the same, same as they treat children of differing abilities/needs the same and of different races the same.
Uniform list doesn't specify boys or girls, it's just:
White shirt/blouse
Grey trousers/skirt/pinafore/shorts
Grey cardigan/jumper
Royal blue tie
Blue gingham dress is optional for summer
Long hair must be tied back, no exceptions.
Jewelry is strictly limited to one pair of small earrings.
So technically the boys could all rock up in skirts should they so desire. To date, none have.
PE is mixed - whole class does it together. All children are encouraged to try out for the football team (still mostly boys, though), all children are invited to join netball club. Role play areas in KS1 classrooms are in gender-neutral colours. Nothing in classrooms that depicts perceived 'gender attributes'. No segregation by gender in queues, groups etc. Children encouraged equally in classrooms in terms of maths, science, reading. Our literacy coordinator is pretty fab - she set up a book club to encourage all children to read more - last month we read Wonder (yes, I go, and yes, I cried).
Before now, I just assumed that all primaries were like this these days. Looking at this thread, maybe we're lucky.