55008 (D9008) "THE GREEN HOWARDS" waits at Darlington with the 1V93 09:50 Edinburgh - Plymouth service on 15th December 1979. The engine-room windows give a view to the Napier-Deltic power units, though perhaps unsuspectingly to those peering in 55008's No.2 power unit was time expired and required exchange. On arrival at York 55008 was despatched to York TMD for repairs, rather than the usual return to Edinburgh via 1S27 07:25 service from Plymouth and was sent to works for power unit swap two days later.