The 3MM Society offers a numberplate kit to make GWR numberplates. The etch is quite good and provides enough numbers for two locos, one 4 digit plate and one three digit one.
The number chosen 9623 was a Newton Abbot engine in the 50's so is right for Hennock (and Teignford).
But boy is a fiddle. The suggested way to fix the numbers to the plate, after painting it black, is by gloss varnish. My eyesight is not what it was, and as can be seen, more numbers escaped than were used. Next time I will use the magnifying light.
Just need to let it dry overnight and affix to the cab side, then find some small numbers to make the smokebox plate.
Hennock is at the Southampton Model Railway Exhibition today and tomorrow-we will be pleased to see you.