The suspension sign seems clear enough. The sign includes the symbol for No Waiting, plus words No Loading, meaning the only thing allowed is boarding/alighting passengers, so not sure how you could have misunderstood this. So the contravention would seem to be made out.
The final question is, there are three signs for this lengthy bay, so how many suspension signs are there ?
Putting a single sign at one end of the bay could be regarded as inadequate signage, one on the central sign probably OK, and one at each end would be OK. A suspension sign on all three poles would give them a bullet-proof defence against inadequate signage.
Apart from the above, I can't think of anything else to support a credible representation, so wait a bit for others to comment, but don't miss any deadlines waiting, if you're minded to pay.
Interesting to see they have put the TTRO document on the pole. There is no legal requirement for this, but it must exist to support the suspension.
