You get a risk-free shot at the title provided you submit reps before 16th - read the back of the PCN.
Contravention did not occur
You can see from the photos that your parking was not exactly driving test standard, but none the less you dispute that no part of the vehicle is within 50 centimetres of the edge of the carriageway. As the CEO didn't have any way of inserting a scale in their photos, all parties are left to deduce. From your perspective, you would refer to the diameter of your wheels, including tyres, which you have just measured as ****. It can be seen that if your rear offside wheel was laid on its side it would *******.
OP, if you would measure your wheel from tread to opposite tread and let us know the measure then we'd know how to finish the above.