Unpermitted roadworks problem

Customer reports that the road closure at the location is impacting upon their business; there has been little/no notification. Both customers and deliveries are unable to gain access; the only diversionary route available for LGV's, down Carpenter's Lane, is inaccessible to them. Furthermore, there is nobody on site working, so they are tempted to move the works signs to allow people through [customer has been advised not to touch anything and acknowledges they won't]. Please can some arrangement be made to facilitate access asap (**urgent response appreciated**).