I say this every time we have such a thread - I lived in Saudi Arabia for six months and even there young girls did not wear hijabs, or any sort of covering. Until their teens girls were in typical Western garb i.e. jeans, dresses, sparkly tops, etc.
I don't give a toss if grown women in the UK choose to wear the niqab or go half naked, but do strongly object to very young girls being paraded in hijabs.
They should be banned in primary schools.
A generation ago it was unusual to see a Muslim woman in as much as a headscarf, now their granddaughters are in hijabs.