No surprises for guessing that this thread has been started by the impulse purchase of a Heljan Met BoBo from a certain Liverpool retailer, and a side-diversion to build a minimum space layout for it to run on and perhaps a bit of shunting with our Bachmann Midnight Metropolitan stock (but not at the same time). I also fancied building a bit of juice rail after years of hanging overhead wires.
Despite a lot of exhaustive research, I've yet to find a photo of the actual coal siding for Chiltern Court at Baker Street station, I've seen the ones in the LT Museum collection (ie: https://twitter.com/...826864747278337 ) and found others in Historical sites taken from an elevated position at the country end of the station and large scale OS maps from 1952 that show the position of the turnout, but nothing to show the loading dock or even what is there today (although that overhang still looks damn ugly).
Another issue I've found is exhibition punters are very receptive to micro/APA box sized layouts, but only when they show the whole of a scene- as emotive as the photo of Number 7 is in the above link, you wouldn't be able to see much as a layout because P1 would be in the way and it'd be difficult to portray that viewpoint in 4mm/ft scale. And even something based on that operating arrangement would still need two locos, one to bring the train into P1 and an available layover engine to perform the shunt and take the train out. I have come up with an APA sized plan based around a double slip that works on the theory of having the loco siding on the west side of the station and truncated platforms, but there is still the perception of something missing from the whole scene. There is also the concept of a "reverse inglenook" where one line has been retained past the end of a pair of terminal platforms towards a disused tunnel mouth, with the reverse siding back into the coal siding. Either way, I'd need either two locos or two turnouts to avoid propelling moves (turnouts are ~£20, Met BoBos are £74....).
So, does anyone know of any accessible photos of the Coal siding...? (I've been slowly looking through Mrs 298's legendary LU book collection but not found a lot either but even a mention to something in print would be useful).