Hashim, here's my draft. I decided not to include the box position argument as I think it's not going to be a winner, and takes focus away from the argument I think has more chance of success (but even this I think is probably below 50%, but still has a chance).
Dear TFL
Re PCN XXXXXXXXXX
I recently received the above referenced PCN in respect of stopping in a box junction. Having reviewed the video evidence you provided, I would like to submit representations on the grounds that the contravention did not occur.
My car first enters the box junction at 16:30:17 on the clock shown at the top left of the video. It initially comes to rest, very briefly, at around 16:30:30 on the same clock, and during this time (approximately one to two seconds) the car in front continues to be in (slight) motion (i.e. it is not stationary and so no box junction contravention can occur even if my car does stop).
Having moved off again, my car then comes to rest again at around 16:30:45 with what seems to be around half a cars length within the box junction markings and remains stationary until the end of the footage some 13 seconds later. Crucially during this time the car is at the far end of the junction, some distance from the video camera. Due to the distance, the camera angle, and because there is a lamp post partially obstructing the view, it is very difficult, if not impossible, to reliably assess the distance between my car and the stationary car in front.
A box junction contravention involves causing a vehicle to enter the box junction so that the vehicle has to stop [my emphasis] within the box junction due to the presence of stationary vehicles. It is well established that stopping with part of a car within a box junction when this is not necessitated by a stationary vehicle blocking the exit (for example when there is sufficient room to fully exit the box junction) is not a contravention. As such, in this instance, the evidence provided is insufficient to demonstrate whether a contravention occurred.
On that basis, unless you have additional footage you can provide which shows the position at the front of the box junction more clearly, I look forward to the cancellation of the PCN.
Kind regards,
If you can leave it 24 hours, you may get some additional comments/improvements from others.