Another use for duct tape! The front of the redundant headcode panel of DMBS 51359 has been stuck on with the tape by some resourceful maintenance engineer. L421 (51359, 59511 & 51401) passes Iver on 22 February 1990 with the 2F40 12:20 Paddington to Maidenhead Network SouthEast service. Coincidentally, just twenty minutes earlier L420 had also passed this way.