Here is my draft, I have included all points that are not subjective. Thanks Again everyone!

Dear Sir/Madam
Ref: PCN Number: GX09900630
My grounds of my appeal are that:
The contravention alleged by the Authority on the Penalty Charge Notice did not occur.
1. Paragraph 7(1) of Part II of Schedule 19 to the Traffic Signs Regulations and General Directions 2002 provides
that no person shall cause a vehicle to enter a box junction so that the vehicle has to stop within the box junction
due to the presence of stationary vehicle. The councils evidence does not show my vehicle entering the Yellow Box Junction. And the offence is completed at entry of the YBJ which is not shown. London Tribunal case 2130491073, 2160264616, 2230099245
2. The top left hand corner of the box does not meet the kerb line. In the absence of any special authorisation that this box is compliant with either diagram 1043 or 1044 of The Traffic Signs Regulations and General Directions 2002. Therefor this PCN is unenforceable. London Tribunal case: 2110069641, 2110138201
3. The PCN states I committed the offence at 17:26 whereas actually it must have been no later than 17:25, But this cannot be verified due to my entry not being on the CCTV.
4. The PCN states contravention code 31. However this is captured on CCTV so the code should be 31J.