Buckingham Road bridge at north end of Wood Green station. The loco has a tripcock so it definitely isn't D5534 which the neg said. It has to be from within the following:D5586-D5615, D5622-27, D5639-54, D5671-79.So possibly D5594? I'd date the picture as 1960 not 1959, the loco has no electrification warning flash. The train looks like an up Cambridge Buffet Express: load 7 Mark Is except for a Gresley buffet in the middle was a typical CBE formation