100% this.my daughter started high school in Sept 2020 her uniform cost us £250, blazer alone was £48 (she lost it after 2 weeks so has to replace)
tie £6
school jumper £13 then there was the cost of the P.E. Kit,tracksuit, 3 different p.e. tshirts.
When she was in primary school,I used to get her uniform from either Aldi or Lidl for under £20
A couple of high schools in my area have an amazing school uniform shop that help parents struggling financially.
I will only ever have to clothe one at a time at high school, but can’t imagine the cost if you have 2/3+ at high school at the same time!