Network Rail have designated this train HOPS - High Output Plant System. But can anyone give a full explanation of the MPV elements - SOPB, HOPB, SNPB, HNPB and SORB.

Many Thanks John M.

http://www.networkrailmediacentre.co.uk/News-Releases/Groundbreaking-factory-train-to-cut-years-off-Great-Western-electrification-1e0d.aspx

Still no answer to the question as to what the Initials refer to though.