Something like this:
Dear Sir or Madam,
I am writing to make a formal representation against the above Penalty Charge Notice on the grounds that the alleged contravention did not occur.
For the purposes of these representations I am assuming that the cones which are shown clearly in my photos were placed by or with the permission of the council. Their presence had the effect of reducing the size of the bay by some 2m such that what remained had a length far less than the statutory minimum. But instead of suspending the use of what was now a redundant and unlawfully sized rump, the council chose to penalise a driver who tried their level best to fit within the space which remained.
Of course, if the cones were not placed as above, then the CEO should have removed them and invited the driver to reverse in order to regularise the situation.
In your response to my initial challenge, you stated that vehicles are only permitted to park within clearly marked bays along this road. However, this restriction is not clearly conveyed by the signage present at the location.
On 28 January, I revisited the location and took photographs of the signs along the road. These photographs demonstrate that the signage does not clearly indicate that parking is restricted solely to marked bays. As such, the restriction relied upon in your response is not adequately communicated to motorists.
For a parking restriction to be enforceable, it must be clearly indicated by appropriate signs and road markings so that a reasonably diligent motorist can understand the restriction. In this case, the signage along the road fails to clearly convey the requirement that vehicles must park only within marked bays, and the placement of the cones further contributed to the reasonable belief that parking in that position was permitted.
Given the lack of clear signage indicating this restriction, and the misleading placement of the cones, I believe the alleged contravention did not occur and that the Penalty Charge Notice has been issued incorrectly.
I therefore request that the Penalty Charge Notice be cancelled. Please find attached the photographs taken on 28 January which show the signage present along the road at the time.
I look forward to your confirmation that this notice has been cancelled.