You do need a trade account with Castle Hardware Birmingham to get these . They currently have these Dickies Antrim workboots for £16.95 (no vat). They are great boots even at the normal price , i would have got a couple of pairs myself but i had the last size 8 .
From memory they have plenty of size 9/10 and a few 11/12 . This is instore only , might help some people if you are local.