What do they make at the Humber Refinery?

Much is made these days about the lithium inside batteries or the cobalt that also goes into the cathodes. Far less is said about the other end of the battery. Yet without the kind of graphite produced from Humberside coke (and this refinery turns out to be one of the world's most important producers of the stuff - and the only one in Europe) net zero will remain a pipe dream.