B450 (51352, 59547 & 51394) passes Chilson on 21 June 1987 with the 2A32 09:40 Worcester Shrub Hill to Oxford service. There were 84 Class 117 driving vehicles, but only 39 centre trailer cars, so it is clear that several sets had to run with centre vehicles from other classes. Class 118 vehicles were the normal choice, but B450 ran in the 1980s with a Class 101 trailer. The different windows, and fewer number of doors immediately stands out in this view.