DS, 3, will be going to the nursery at our local state primary school in January (afternoons for the rest of the school year followed by morning sessions at the school nursery proper in September).
He has to have a proper school uniform - school sweatshirt, clip-on tie, grey trousers, white top and black shoes - although they did say they don't enforce the sock colour as they would in the rest of the school! And the change of clothes in case they wee themselves doesn't have to be uniform.
All the schools where I live seem to have uniforms at nursery, but I wondered if this is now the case everywhere? Personally I would rather uniform wasn't compulsory before Reception, as it might not be the most comfortable thing to wear when doing lots of outside play and messy play etc, plus there's the expense, the faff of having to get changed before nursery, and the fact I may actually have to iron it. Children already start school so young and it seems even younger when you see children with a nappy under their uniform.
On the plus side I have seen children at afternoon toddler group who like the uniform so much they don't want to change out of it and I suppose his own clothes won't get ruined.