For part 4 of this series we are looking at Northern Transpennine. Class 25 diesel electric locomotive in BR Blue. Class 123 diesel mechanical inter city multiple unit in BR Blue/Grey (after transfer from the WR). Class 124 diesel mechanical Transpennine multiple unit in BR Blue/Grey. Class 128 diesel mechanical parcels unit in BR Blue Parcels livery (Midland Region variant). Class 141 Pacer diesel mechanical multiple unit in West Yorkshire PTE Cream/Teal (for Huddersfield to Leeds services).