If you selected the wrong option then I suggest you might consider this alternative draft for your reps. The web code is in the PCN.
IMO, your argument is 'contravention did not occur'.
At ** on *** I was parked in *** facing towards *** having just ****, something which I do regularly. Equally regularly I execute a 180 and leave in the opposite direction. Depending on surrounding vehicles, my position relative to the kerb and my steering angle I might need to drive through part of the bus stop.
On this occasion I had assessed the situation e.g. no bus in the bus stop etc. and had started my manoeuvre (off camera), having let a car pass me(the one which can be seen in the clearway) when this same car pulled into the clearway to stop and drop off a passenger(again, clearly seen in the video). Them committing a contravention by being stationary had the inevitable effect of causing me to have to stop in order to avoid a collision and therefore damaging property and potentially persons. Having done so, I immediately reversed and then drove forward. I would add that I did not wait for this car to move because I wanted to avoid being stationary any longer than was unavoidable.
Having set out the full facts, I would now refer the authority to paragraph 4 of Part 6 of Schedule 7 to the Traffic Signs etc. Regulations which provides:
Exceptions applicable to paragraphs 1 and 3 [the prohibition on stopping in a clearway]
(2) The prohibition in paragraphs 1(1) and 3 does not apply in respect of—
(b)a vehicle which is prevented from proceeding by circumstances beyond the driver’s control or which has to be stopped in order to avoid injury or damage to persons or property;
The exception clearly applies in my case and therefore the PCN must be cancelled. If the authority do not and instead reject these representations then, given the comprehensive nature, clarity and relevance of my claim to the exemption you are obliged under your public law duties to put forward equally sound reasons which address the substance of the representations.