20189 (in London Underground livery as L189) leads train 746, the 12:08 from Amersham to Harrow-on-the-Hill, downgrade from Chalfont & Latimer through Old Hanging Wood. Next to the loco is Met No. 353 first class coach. The train has reduced the deficit to just under 40 minutes as it passes at 12:51 on Saturday 25th May 2013. Met Electric No. 12 "Sarah Siddons", GWR 0-6-0PT No. 9466 and 0-4-4T Met No. 1 bring up the rear of the train. Digital Image No. GMPI15633.