Here's a representation for you to send:
Dear London Borough of Bromley,
I challenge liability for PCN BY22338841 because the alleged contravention did not occur. This is because there was no signage or other indication stating that a vehicle must be parked within any particular markings, so even if the traffic order requires this, the council has failed to bring that provision of the traffic order to my attention.
Furthermore there has been a procedural impropriety, this is because the notice to owner is required to state that the penalty must be paid before the end of 28 days beginning with the date of service of the notice, but the notice you have served wrongly states that the 28 day period starts with the date of the notice. The effect of this is to cut the 28 day period short by two days, but it is a mandatory requirement of the regulations for the notice to owner to state the correct 28 day period.
For either of the above reasons the notice to owner must be cancelled.
Yours faithfully,
Send this online and keep a screenshot of the confirmations screen.