Plank Lane 
Eddie Whitlock OO gauge 4mm scale
The NER opened its engine shed (the real one) at Ferryhill, Co. Durham in 1881 to house a dozen or so goods engines, but the allocation had risen to about twenty 0-6-0s at the time of the Groupings. It remained fairly constant, along with the addition of two class G5 0-4-4s, until 1935, when it housed the allocation displaced by the closure of Shildon engine shed in that year. Ferryhill itself survived only for two more years before closure, although it enjoyed a brief claim to fame during World War Two, when exhibits from the National Railway Museum at York were sent there for safe keeping.
There was, of course, a second, but fictitious, engine shed at Ferryhill, called Plank Lane. This shed was built on a site originally occupied by a small depot of the York, Newcastle and Berwick Railway. That railway was taken over by the NER in 1854 and the depot was retained and enlarged to house freight locomotives used to service the coal fields of County Durham and North Yorkshire, but unlike its NER counterpart, it survived much longer, mainly due to its location in the triangle formed by the lines to Stockton and Darlington that gave better access to diverging routes and removed the need for a turntable. Therefore the allocation of goods locomotives moved from the NER shed to Plank Lane. It also meant that I did not have to build a turntable!
Its reasonable proximity to Darlington works to the south ensured that it could also be used by locomotives on running-in turns after attention at the works, therefore allowing a variety of locomotives be seen visiting the depot for checking and servicing before turning on the triangle and returning to Darlington. At about this time, some of the exhibits and potential exhibits, stored during the war, were test steamed prior to returning to the museum by running them to Plank Lane. So you may see some unusual visitors.
The scene you see is sort of 1964-ish, when the LNER was embarking on its renumbering scheme. The shed had seen some refurbishment after the ravages of wartime austerity and is in reasonable condition. Some locomotives had been through the works and reappeared with the new numbering system, while others awaited such attention.
