What seems to be saying on this thread is that the reason women and girls wear a head scarf is:
- Sexual modesty because of their religion.
- It is a cultural habit in a country they have a connection to.
- Both of the above.
So while small children should not be worrying about sexual modesty, we do not know that is why they are being covered. It may simply be as a cultural habit, and as a cultural habit it is harmless - just a piece of cloth. I work with lots of Muslims and it does seem to mostly be a fashion; it is not a reflection of actual behaviour at all.
I do think a compulsion to cover the head and the legs entirely is wrong (and I hope all of those girls are on compulsory vitamin D supplements to make up for the enforced lack of sunlight to the skin), but it is clear in the slide show that not all the girls do wear head scarves to that school.
The Saudi Arabia thing seems completely irrelevant. This isn't Saudi Arabia and most Muslims in the UK have no connection to Saudi Arabia. It would be like making out that the British are just like the Brazilians because they are both Christian nations, and that we should consider the cultural and religious connotations of clothing in Brazil before we dress our daughters in the morning. I have no idea what the meaning of trousers is in every Christian country in the world.