@Hippocrates..
But they must produce evidence which is not dated and must show the name of the street.IMO, they must adduce evidence which satisfies the adjudicator as to the presence and visibility of the sign in question on the day. Whether the adjudicator would accept library evidence is in their discretion alone.
OP, I think you're on a loser with the contravention.
However, I find the wording of the NoR very questionable, in particular:
Their repeated references to 'Within* 28 days of the date of service' or similar'.
It's simply wrong, it's 28 days beginning on.
But what really annoys me is:
'..please read the enclosed form ...and then complete, sign and send within 28 days of the date of service to..... '. This clearly implies by post which means that their instructions are misleading because the appeal must be received by the tribunal no later than the end of the period of 28 days beginning on the date of service in order to maintain your statutory rights. Yes, the adjudicator could in their absolute discretion register an appeal sent late IF this is accompanied by reasons for lateness.
However, TfL's instructions do not refer to reasons for lateness and therefore anything sent within 26 days of the date of service could be submitted LATE and therefore disregarded. And if this was sent on a Thursday or Friday then anything sent within 24/25 days could be LATE.
How they get away with this tosh after all this time is one of the wonders of the modern world IMO. (NB. the PCN is squeaky clean with its references to periods i.e. 28 days beginning on..)
One of our regular posters has also done battle on the issue of 'for further info see the Tribunals website' i.e. seeking to convey info by linking to an external source. IMO, whatever that site contains has NOTHING to do with TfL's duty to issue a compliant NoR.
*- the courts have held that 'within' excludes the trigger date. Therefore the end of the period of within 28 days of, say, 1 May is 29th whereas 28 days beginning on is 28th.