Class 20 No. 20189, also carrying the number L189, brings up the rear of LUL test train 746 as it passes through Chorleywood station, with 20227, 20142 and Met Electric No. 12 leading the 4TC set. This departed from Ruislip Depot at 09:30 and went via Harrow-on-the-Hill and reversal at Neasden Depot to conduct track and signalling tests at the sidings south and north of Amersham prior to the "Steam on the Met" events in May. 11:30, Friday 26th April 2013. Digital Image No. GMPI15207.