it is for them to prove they have the necessary consents so your edidence is enough in this respect. Now you must read up and copy the town and Country Planning Act 2007 section about advertising display hoardings etc. they will claim they have " deemed consent" but this applies to signage that is informational not advertising and they are advertising a contract and it is therefore necessary to apply for that permission under whichever of the later sectiosn of the rges apply. you can point out that siganeg that fits in witht eh "deemed consent" is restricted in size so would be too small and would be considered illegible as it is aimed at the driver of a moving vehicle. this is secondary to the lack of an offer by way of signage at the entrance to the land so no offer and consideration.
There are cases that were chucked out because of both of these defences so look at the parking pranksters blogspot and use whatever you can find. look for other case law on unilateral contracts and offer and consideration as well, it doesnt have to be about parking. the size of the fonts, the colour of the signs and characters, the relative size fo the main points such as you ahve to pay £100 for breaching a term is the core consideration so they need to be of equal size or bigger than the main notice and this is rarely the case so it can be taken that the matters in the small print are not a fiar contract under S62 of the consumer rights act.
again this point is one that isnt always taken on board by a judge so to be used in conjunction with commenst on quality of signs, siting of signs and their illumination etc to give an overall picture rather than a specific killer point.
Dont forget the judge's decision in anohter case on this forum that determined that each disabled space must have its own signage( not just a paint job) and the terms for their use must be made clear at the entrance and not just on the space
Shocking pictures reveal ‘disgusting’ conditions inside Hermes depot where workers ‘feel like slaves’. Read more at https://www.consumeractiongroup.co.uk/topic/419726-shocking-pictures-reveal-%E2%80%98disgusting%E2%80%99-conditions-inside-hermes-depot-where-workers-%E2%80%98feel-like-slaves%E2%80%99/
Euro Car Parks issued this ticket to the police in Devon and Cornwall. Read more at https://www.consumeractiongroup.co.uk/topic/419522-can-anyone-identify-the-parking-company-which-issued-this-ticket-to-the-police-in-devon-and-cornwall/