Incident involving low obstruction, which I hit! Need to know height restriction signage

[eastern]

I recently had an accident in my companies van. What happened was I hit the archway that is part of the entrance to a courtyard where I was delivering to. I reversed and hit the archway doing damage to the van and I believe to the archway itself which is part of a house. The owner is getting a structural engineer to inspect the damage and it is now in the hands of the insurance company. What I need to know is; Is there a legal requirement to have a sign firstly warning you of a low obstruction and secondly informing you of the restricted access height limit, ie 2.3 mtrs? Non of these signs are present and even though I knew the obstruction was there I still did not know the height limit. The incident happened in Scotland and on what is sign posted as a private access. Any help would be greatly appreciated, so thank you in advance.

[cassa333]

Out of interest why do you want to know?