I have created a new user account so not to assist Miah Solicitors with their claim against. I've contacted the owners of the land.
The signs have not been displayed illegally and do not require planning permission as they are allowed under permitted development rights. See copy attached.
This aside UKCPS are only involved because the area is not a car park, it is a service yard and we are required to restrict usage to prevent members of the public from mixing with delivery vehicles.
Rob Morton MRICS
Commercial Property Management