I see comments in various places to the effect that uniforms allow girls to wear trousers and don't actually say boys can't wear skirts but none do wear them. This may be hard to believe, but a handful of boys at my DS's primary school actually have been wearing skirts and it is quite accepted among staff and pupils. My DS was one of the first (not very first though), starting in an absolute heatwave in the Summer when even dark shorts were warm, and other boys joined in when it became "accepted". Suggests more boys like to wear skirts than you may realise, whether for comfort or having a girly side to them. They are stricter with boys skirts eg. must be within 2 inches of knee (so should girls but not enforced as rigidly) and fewer styles are accepted.
With the cold weather coming most are going back to trousers, and boys are reluctant to wear tights as they feel that IS crossing the line, though a few are wearing kneesocks with skirts. DS just likes the fact they have the option of trousers or skirts just like the girls.
Has this happened anywhere else or is this unusual?