... moving quickly on, - - in case it avoids any reader not familiar with the area in those times, getting their thoughts gummed (doh!) up, it was touched on in an earlier post that the rail-served 'Rowntrees' (just east of the main line on the north side of the Down Hertford line) was probably a warehouse
(from its moderate size, I agree; or a distribution depot of some sort).
However the Bassett's premises, around 1/4-mile SE of Wood Green station,
(and quite possibly, IIRC, from its height and appearance, was a factory), was not rail-served.
In case of interest, the 1974-ish resignalling included facilities for an Up train on either the Up Slow or Up Hertford line, and requiring to detach/attach at Rowntrees, to split its train at either the signal south of Wood Green Tunnel (K474), or the one alongside Bounds Green Depot (K476), as appropriate, draw forward onto the Up Slow clear of the Hert. line junction, setback through the Ground Frame into Rowntrees to work as required, then draw out again, and then be signalled back onto the rest of its train, before continuing south.
There were two regular Up night-time class 6's sometime in the '70s & early '80s (6C62 and 6E65 I think), at least one of which was booked to call at Rowntrees, and was I think booked via Hertford because of that.
Sorry, that lot's a bit too far removed from 'trainspotter's core enquiry I think.
In mechanical signalling days, Rowntrees was accessed from (only one of?) the two sidings which used to run from below the Down Hertford line flyover/the foot of the flyover's embankment, south to No.2 (Up lines only) signal box, flanked on either side by the Up Slow and the "Up Branch"(a.k.a. "Up Enfield") lines.
