I had girl students at my last school in the UK who belonged to a very strict Christian brethren. They had to wear long skirts with long socks, long sleeves and a scarf- and were often teased. No problem has far as I was concerned re dress- but they also had to leave school after GCSE's which broke my heart.
Again, as far as my Muslim 6th Formers, the concept of all UK girls being 'free' seemed an anathema. Our girls are hugely influenced by the Press, especially some girl's/womens' magazines, TV, celebs, etc- on how they should behave, dress (or not dress) how to look, on body shape, etc. And also manipulated enormously by the boys and men in their lives to perform sex acts, etc. Not all of course, just like not all Muslim women are manipulated by their men. The apparent freedom of our young women, and women in general from some sections of our communities, can be very shallow indeed. You don't hear of many Muslim women suffering from anorexia, for instance. Some girls in the UK become anorexic from the age of 5, as they feel that pressure to conform to 'magazine/celeb' beauty and shape.