Sussex are all white shanks and skin right? Most all English breeds are white skin/legs... Including their bantam counterparts which are not "classed" the same as large fowl... Like American, Mediterranean, English, Asiatic.....
Bantams are classed differently but have to meet the same standards as the BREED that they are. Plus there are some breeds that do not have a Standard size and a Bantam size counterpart... Silkies being one I can think of right off the top of my head... Seabrights being another...