Am sure other school parents think I bought special outfits.
It was "creative and crazy red" at ours. They both have new looking, and crazy, costumes. However, I am queen of the charity shop and they are actually existing costumes from our dress-up box which cost £1 and £2 respectively. They're thrilled to give them an outing at school.
I did buy a pair of £7 H&M trousers. But H&M trousers are the ones that fit DS the best (other shop's ones don't suit his shape) and he adores bright colours and especially red, so I probably would have bought them anyway as I was in there looking for trousers as he's just shot up.
Have sent them with their £1, they're happy and having a good time, don't think any of it matters too much so I am opting for YABU.
Our school, by the way, has a red uniform anyway and they made it very, very clear the whole thing was optional.