@cp8759Re the CPZ entry signs, I've not taken photos of them. I could, tomorrow, but I don't believe that any case for them being obscured could be made. The ones on GSV show them as they are, pretty much.

Subject to seasonal variations in leaf cover obscuring the one on the RHS of the road in the top photo (if you zoom in on that one you can just about make out where it is).
I don't know to what extent that one would have been covered in October when the contravention occurred, but the one on the driver's side of the road is never obscured, and as I have lived in the CPZ since before it was created I would have driven past that sign thousands of times. What I'm trying to say is that I can't envisage any credible case for claiming that I couldn't have known about the CPZ because of signage issues.
As I said earlier, there are only two entrances to the CPZ, at points marked A & B on this map:

In the photo, A is the top one, B the bottom. At location B there is still only the one sign on the LHS of what is a single track road.
I've got 28 days from when the NTO was served to make representations. They don't say when they regard it as having been served, but if we assume that they use the same system of second working day after the date of posting which they did for the rejection of my initial appeal, then with an NTO date of 04/01 that takes me to 05/02/24.
All I can think to do is to ask them to use their discretion to cancel the charge, because of the following:
1) There are signs on lamp posts along the road in question which could be taken to mean that the SYL has different restrictions to the CPZ, and to add weight to that
a) the fact that within the CPZ there is at least one SYL with a sign which
does carry different hours to the CPZ times
https://maps.app.goo.gl/X7tHWgtc4Tq2NmJh6close-up:
https://maps.app.goo.gl/G2nev91bEukgH6xAAI'll take a photo of that tomorrow - seems like a good candidate to upload and set up a view counter?
b) referencing documents from several other London councils which establish the principle that there can be SYLs within CPZs which define different restrictions to the CPZ.
2) In mitigation that I was parked across the driveway of my own house because I had a skip there which prevented me from parking on it, so I was not causing any obstruction or inconvenience to others.
I know it's all a bit straw-clutchy, but it's all I've got...
And apologies for not getting back with this sooner - been meaning to do it for days, but have been swamped with getting stuff back into the house from storage now that the builders have finally gone...
If it's too late for you to help I'll quite understand, but if I could at least beg the details of how to set up a click counter (or is it Linkly?)