Most uniforms I have seen revert to cheap pilot shirts, an itchy 100% pure wool "NATO" jumper complete with pads and eppy holders and generic suit trousers.
You can get all the above and the same for much cheaper from a SECURITY GUARD supplier.
Be wary of people mistaking for that, the fuzz or a fireman in the supermarket.
I don't intend to wear uniform until I am being paid for my services.