Sorry I dont have an answer but I'm waiting for them to get some more black tie boots in a 6 and a spot dress in a 12!! Annoying cos this stuff isn't in the shops!
I wanted to buy a coat from topshop online but it was out of stock in my size so I e mailed them to find out when they would have it, but they said that they only have a limited amount of stock and once it's gone, they don't get anymore. As Miss selfridge is the under the same company, they probably do the same.