EWS's (now DB Schenker) 37411 Caerphilly Castle / Castell Caerfflli and 37425 Pride of the Valleys / Balchder y Cymoedd called at the Buckinghamshire Railway Centre on the 17th February 2007 with Pathfinder's Bard & Birch Railtour. This went from Bristol Temple Meads to Stratford, then Quainton, returning to Bristol Temple Meads. Full details can be found on The Six Bells Junction website - navigate through the railtours menu to get to the details.