Thinking of putting some signals on my layout. What would be the most appropriate type to use on a small loading gauge freelance narrow gauge? Standard M&H or could I get away with 4mm standard gauge types?
Have a look at Model Signal engineering. Most of the mainline railways, particularly pre-grouping used Makenzie & Holland, Saxby& Farmer, etc. equipment bought off the shelf, and that included the Irish NG lines and I suspect a lot of the colonial NG lines. I also suspect that if you want a really old fashioned 'disc & crossbar' signal, as used of the Ffestiniog you'll end up getting a GWR broad-gauge pattern one.
Though at the end of the day it is Your Railway. If it ever ran as part of one of the mainline companies then renewals would have ised that company's equipment, and if you are running it as a preserved line then that's probably all that the preservationists could obtain!
Many thanks - I'll look at M&H and S&F equipment. Good job there wasn't any Saxby & Mackenzie...