Phil, you could always bury the ones that you don't want to be visible to the player and put the genuine ones in their place (with the same speed limit on the sign) that aren't recognised by the track monitor. What I mean is just regular 3d objects. The Truro line in my midnorth route has buried signals but they still enable crosses. This is virtually equivalent to what I have suggested.
Ah yes, this is exactly what I would be doing within my Blackwater route, thanks for the suggestion

The bottom sign is only for the Left and Dual points these will be separately placed onto the main speed limit sign

Would anyone know the key command to select multiable shapes within Route Editor? I can't remember how to select multiable shapes althrough I know it's possible which the user can select both shapes by holding down a key and rotate both shapes without any problems
* The Dual speed sign doesn't mean it used for dual guage track just the sign face with 2 arrows indicating points ahead is on both sides of the mainline such as Blackwater used to have before duplication