43163 Exeter Panel Signal Box 21st Anniversary 2009 passes through Kings Sutton station on 15 October 2010 with the 1Z12 09:57 Banbury to Westbury First Great Western proving run, in connection with planned diversions over the Christmas period. It had earlier worked the 1Z11 08:03 Paddington to Banbury with 43183 leading, providing the very rare sight of an HST on the Chiltern Line. It would later work the 1Z13 12:10 Westbury to Waterloo and 1Z14 15:10 Waterloo to Paddington.