So, having turned into this road, what did you do next, carry on down the road ?
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I'm really not sure. There was definitely one road that I briefly turned into and then stopped, as per my original post, as I had a conversation about it at the time with my daughter who was also in the car. Having seen the photo on the PCN though it can't have been this road, as it clearly shows me by the kerb markers. I can only assume that the PCN is not for the road I first described but for a 2nd road that I drove all the way up without even seeing the CCZ signage.
Thanks to everyone who read and responded to my post