So I parked in a loading bay and got a ticket after 8 minutes. I appealed saying I was loading and hadn't exceeded the 20 minutes allowed. They say I have to provide an invoice or receipt proving that I was loading. I can't do this. They say they can give a ticket after 3 minutes if they don't see you physically loading. They say that they don't have to make explicit on the loading sign that you will need to require evidence of your loading if for example you are waiting in a shop for a few minutes.
This is a red route penalty charge of £60. Have I got a case or shall I just pay it? I just spoke to them and they said I could get a letter from the shop, but we're talking end of June - how would they remember me?
Thanks for any advice.