(01 Feb 2015, 3:53 pm)tyresmoke wrote No Dan, Stagecoach employees can use their pass on all Stagecoach divisions (bar London) - plus any relevant agreements in their respective areas, eg North East would be Arriva North East and Go North East officially (and Nexus ops like Metro, Ferry). Of course you can normally use your pass on operators with a relevant agreement in other areas but this is not strictly allowed under the terms. You'll generally find all of the big 4 accept each others passes (including First in this).
Was certainly one of the big operators where staff passes were divisional only (at least at few years ago this was true). Believe it was said that employees aren't supposed to use them in other divisions but many drivers just accept them anyway. My memory mightn't be serving me as well as it should be, though, and I could be thinking of an Arriva pass being used in an area where there's an agreement with First (or something similar).