the school uniform policy is here.
https://www.pimlico.futureacademies.org/attachments/download.asp?file=79&type=pdf
on items of religious significance, it says:-
3.6 Items of religious significance
Some students may choose to wear headscarves. Headscarves must be black or navy blue.
Pins or clips must be small, dark in colour and understated.
There can be no decorations such as sequins or patterns.
Some students may choose to wear a turban. Turbans must be black or navy blue.
There can be no decorations such as sequins or patterns.
The academy's decision is final.
the policy is not dated as such but embraces the 2020/2021 school year so probably wasn't introduced recently.