Looking at the coal hole dimensions in the previous post it would appear the scale may be a tad too small for a shed in the 1950s. The coal chute would appear to be not quite level with the top of the Jinty's bunker and the weather canopy of the wagon ramp would be too low for a Jinty to enter.

The former problem can be solved by simply raising the entire structure above the coaling road. The clearance required for coaling a Stanier 4000 gallon tender, possibly the tallest tender to be anticipated at Legge Lane, is less than the height of the loco at just under 11 feet. Elsewhere in Nelson's book the clearance is given as either 10' 3" or 9' 3". The pivoted chute would only be lowered when actually coaling the tender, so the maximum chimney/cab clearance at around 13' 2" would mean that movement would have to be restricted during coaling. Perhaps an appropriate sign on the coal hole wall would be a requirement?

The coal road canopy problem may not exist as I am aware of notices at the entrance to GWR coal holes that restrict locomotives from entering a coal stage while shunting coal wagons. More research is needed to see if this also applied to LNWR coal holes. If needs be, I can always raise the canopy.

Once the turntable is completed and a track plan can be drawn, I think it would be a good idea to fashion some simple mockups of the main structures using poster board. I know some modellers do this with freestanding buildings like pubs, cottages, etc. but here the need to get the clearances right is critical.

Finally, a question to any experts out there! Were LNWR/LMS water tanks covered? There are very few photos taken from above water tanks, not one in Hawkins & Reeves vol. 1 LMS Sheds - LNWR. I seem to remember a photo of Bangor that was open, but Nelson's book indicates that some tanks were covered by 11" x 3" boards. Perhaps these were the smaller tanks?