@sc2509 this is the sort of idiotic PCN that are the whole reison d'etre of this website.
Here's a draft representation:
Dear London Borough of Newham,
The alleged contravention did not occur because my vehicle was not parked, my vehicle was temporarily stopped in order to allow the boarding of a disabled passenger, who required assistance from the adjacent premises. I attach a copy of his blue badge for your records. The vehicle was not stopped in contravention and the penalty charge must therefore be cancelled.
The wording in the informal rejection that references broken down vehicles and loading or unloading appears to be the result of some rather sloppy copying and pasting of templated paragraphs.
Furthermore there is some rather infelicitous wording in your informal rejection that speaks of "times in which we are prepared to make an exception to this rule", but the rules are not made by you, they are made by Parliament. The author of the notice of the informal rejection also seems to be labouring under the misapprehension that it is somehow up to the council to decide to waive the penalty or not, this is not the case: either a contravention occurred or it did not and where a contravention the council must cancel the penalty; there is no discretion about this.
The only real question is whether you wish to incur the £25 tribunal fee before cancelling the penalty.
Yours faithfully,
Send it online and keep a screenshot of the confirmation page, if they're stupid enough to reject one of us will sort out the tribunal appeal for you.