In connection with the inaugural rugby match at the new Millennium Stadium in Cardiff, the Cardiff Railway Company utilised Class 37 traction on a revised timetable on the Rhymney line on Saturday 26 June 1999. With the last remnants of its Trainload Construction just visible on its bodyside, 37678 heads south from Pontlottyn with the 2F33 13:15 Rhymney to Cardiff Central service.