John has been kind enough to check Barry Fletcher's contemporary notes and they confirm that 31487 did retain 'SOUTHERN' on the tender when renumbered in June'48. Not long afterwards ( date not recorded ) it received lined black livery with B.R. style Gill Sans 'BRITISH RAILWAYS' on the tender and cabside number to suit ......... in May '49 it lost the tender lettering ( so blank ) but gained a smokebox plate.
Needless to say tender insignia changes MIGHT be explained by tender swaps - but it seems that Rails' combination is more than a little unlikely within the known timescale.
The original HMRS 'Siphons' book states "All the bogie Siphons ... had brown bodies and ends with black underframes ..." - maybe conflicting information will be published in the forthcoming revision.
But there are lots of signal boxes and/or level crossings and/or crossing huts on that thread ..................... as it happens, neither Haughley, Baylham nor Wassicks appear on Corneliuslundie's listing - sorry to waste your time responding. ☹️
Not really wanting to get into politics here, I suspect Ben Elton didn't want to spend the whole programme delving into the minutiae of WHY there are long running strikes - in the rail industry and elsewhere.
... and the non-standard gutters. ................. I'm pretty sure it's 8754 : built as a Driving Brake for the 'Enterprise', rebuilt for railcar use and rebuilt again to eliminate the spurious guards van.
York Road : 17/5/94
Dundalk : 9/5/04
Yes, the only time they were likely to run in significant numbers of the same diagram would have been when brand new, leaving Swindon for an initial loading point.
Up my local branch we've had 'Networkers' from two different manufacturers and class 376 for umpteen years - now some 707s have flown in to give three totally incompatible types. In pre-Networker days we had EPBs of two basic styles and innumerable individual configurations - but prior to the EPBs we had 4SUBs of Bulleid style ( plus a few Maunsell style ) and earlier rebuilds with pre-grouping bodies : those had run as three-car sets from electrification - with two-car trailers for peak hours ............................. I don't think they all looked the same ! 😊