Always Appeal. If they deny you, you still get the time to pay at the discounted rate but even then, push for the tribunal. We are unfortunetly dealing with a corrupt system that tries to fleece money out of working people, builds a system that actively works against you to get the money back, and new ways for you to break rules so they have the legal reason to pursue you for money. Treat them like thugs under the guise of "law and order"
If the main sign which has all the important information is too high you can argue that its not visible to you and it breaks the TSRGD regulations. Along with this being a busy road with buses covering the early warning signs, pedestrians crossing, cars parking or leaving, this would be highly distracting. You may not have enough time to read this sign and with the blue sign below being more distinct, you would catch it first before reading the important information.
You can also argue the sign at the road turning isnt visible until you make the turn, checking google maps its only eligible when your on the turn. By then you have a yellow box to deal with, oncoming cars and not enough time or space to reasonably avoid the road. The signage is displayed in such a way that a motorist not able to safely take evasive action to avoid the prohibited route, trying to stop in the middle of the road when turning into the road would cause accidents with oncoming traffic, as well as a PCN in the yellow box. Trying to back out would do the same with opposite traffic. This would create an entrapment situation.
Those early warning signs are right next to the bus stop, you get 2, 3 or 4 buses that would park behind the stop therefore covering it. Absence of dashcam footage doesnt mean this didnt happen, especially if you can photograph the buses there at some point during the day.
Also state the camera doesnt show what a real life motorist would see when driving down this road, for example those pre warning signs being covered, not on the side which a driver would see or not being at eye level like those on the actual road.
Go onto the tribunals website and find other people who have successfully appealed this based on those ground and use it as an added reference.
If the council want your money, make them work for it at the very least.