55020 (L120) & Class 117 L400 (51374, 59484 & 51332) approach Iver on 22 February 1990 with the 2A28 08:50 Slough to Paddington Network SouthEast service. Both these classes of DMU are products of the Pressed Steel Company's Linwood factory in Scotland, with the 121 order following on from the 117s in 1960, and effectively being a 117 DMBS vehicle with an additional cab. Note the different liveries, with 55020 having a lighter shade of blue, and L400 having upswept white and red bands at the cab ends.