Just found out something that might be of use to other mothers whose 8 year olds have huge feet and can only find shoes more suited to teenage slappers...
Start-rite's website www.startriteshoes.co.uk (sorry can't do links) have a complete online catalogue listing all the shoes available including which colours and sizes are available in which style.
You can't order online, but at least you know what to get your shoe shop to order in for you.