I'm about at the point where I can start thinking about the paint job. Handrails and coal rails were fitted this evening, which just leaves a little bit of work around the smokebox saddle.

Now then, livery details....

These engines being maintained at Tuxford I'm aware they were kept in LD&EC-style lining up to 1923 (noted in Robinson Locomotive Liveries that engines maintained or repaired at Tuxford came back in LD&EC livery, except of course for the GREAT CENTRAL markings).

I've got the Carter book on British railway liveries, which reckons that by 1906 the LD&EC livery was black boiler bands (with red edging), tanks and bunkers were lined in grey with a yellow outer line and a red inner. Yet in Dow's Great Central Recalled is a photo of a D class with a thick single light line around the bunker and tanks. Being black and white you can't tell the colour.... Now of course the red and the yellow could merge into the background colour, or the yellow in particular could overwhelm any other lining near it (there's a photo of an LD&EC 0-4-4 model in a large scale on the internet that shows how even a thin bright yellow line does a good job of obliterating the much thicker ligth blue alongside it). http://modelengineeringwebsite.com/LD%26ECR_class_C_loco.html

A little more research required I think.