37042 & 37410 Aluminium 100 pass Codsall Wood (between Wolverhampton and Telford) with the Hertfordshire Railtours 1Z37 06:00 Finsbury Park to Aberystwyth 'Cambrian Explorer' railtour on 8 February 2003. Participants could leave the train at Machynlleth, and travel to the Talyllyn Railway by bus, where they joined trains hauled by either Sir Haydn or Tom Rolt.