Whatever the rights and wrongs of the situation, please bear in mind that the advice to contact the governors/Ofsted immediately, is not always helpful.
You would have to decide whether or not the choice of uniform was an operational or strategic decision. Operational is for the SLT to decide upon and strategic involves the governors. They would probably be involved in a decision to change the uniform or the uniform supplier, but perhaps not the day to day monitoring of it.
I do agree though, that there are anomalies in uniform for both boys and girls- long hair on boys, ties, blazers, trousers, make up, hair colour, shoes and so on.
I'm not against uniform per se and I see the reasons for some decisions such as wearing closed toe and 'proper' shoes, tying hair back etc, but as someone who had to 'police' uniform regularly, I rather resented the amount of time and effort it took.