An impressive Pressed Steel DMU combination at West Drayton on 6 November 1986. L410 (51387, 59497 & 51345), L425 (51405 & 59515) & 55029 (L129) heads towards London with the 2A15 07:14 Reading to Paddington Network SouthEast service. Ordinarily this would be two three car Class 117 units, but as L425's DMBS vehicle (51363) is obviously undergoing repair, 'Bubble Car' Class 121 55029 is deputising. Not much difference really, as a Class 121 is essentially a Class 117 DMBS with an extra cab! 47100 can be seen in the background, waiting to follow, light engine.