My 15 year old dd graciously agreed to go secondary school shopping for her younger brother who is starting year 7. Her rules were;
Black nike backpack (not too big, no elastic strings criss crossing it as they get pinged)
Black padded coat (but not puffy). Minimal padding, almost like an autumn coat not full on winter one. Acceptable brands are North Face, or nike.
Plain black pencil case (2 pens, 2 pencils, foldable ruler, calculator is optional)
Socks must be plain black, and high (so no trainer socks)
White school shirts have to be short sleeved
She is making him purge anything smiggle, smiggle is acceptable in primary. Plain black boringness is secondary school acceptable