With a 'Chiltern Trains' headboard, an interesting hybrid DMU set, led by Class 115 DMBS 51855 approaches Banbury on 11 July 1987 with a railtour returning to Marylebone from a transport festival at Welshpool. This Class 115/108/115/108 combination appeared on several railtours around this time. Another such lash up worked the 'Chinnor Tonic' railtour the following year.