School me. Special B is basically Belgian C120, no? The BCS ESB recipe has a 1/4# of C120 in it. Cant be too out of place, is it?
Special B usually clocks in around 155°L or so. I don't want to talk anyone out of using what they have but authentic bitters, EBSs or English Pale Ales would not have Special B in them, AFAIK. Remember that I subscribe to the idea that you should brew what you like. But with English and German beers, I try to make them as authentically as possible because we have access to all those great ingredients. I like Special B and use it liberally but using it in an ESB to me is like using it in a Festbier... it just doesn't belong in there. School's out.