Thanks Micheal.I have looked at the photo evidence, there are no visible yellow line or clear road markings or bay markings to show that there are any parking restrictions in that particular location.In light of this point, I take on board that there was a sign however, due to the lack of road markings I was not prompted to look for a sign and even if I did, how would I know where the sign applied to. Please can someone point me to how to respond to this PCN by provide me with the right template letter to use.