Well, sorry to have to say it, but you would be stretching credulity at London Tribunals, if one looks at the signage at the entrance to Hartley Avenue, and also where you turned the car round. There are two clear "arrow" signs indicating one-way as you turn in. OK you weren't driving but...
https://maps.app.goo.gl/auaPUz7kJ7oGfWSCAThen right by the place where you turned round there is a prominent "one way" sign not more than 7 metres away.
https://maps.app.goo.gl/jhqTucbbuMpxYdgu6So my opinion is that you would lose your case at London Tribunals, but see what others say. Of course you have the absolute right in law to now register a case at London Tribunals, and test your case there with the full PCN penalty of £160 in play.
Looking at their PCN, it seems to me that they have mis-stated the amount of the penalty charge. It says £80, but this is not correct, the penalty is £160, with a reduction of 50% if the PCN is paid within 14 days of the date of the notice. Regulation 9 (3) of London Local Authorities and Transport for London Act 2003 says: -
(3)A fixed penalty notice under this section shall give such particulars of the circumstances alleged to constitute the offence as are necessary for giving reasonable information of the offence and shall state—
(a)the period during which, by virtue of subsection (2) above, proceedings will not be taken for the offence;
(b)the amount of the fixed penalty; and
(c)the name of the person to whom and the address at which the fixed penalty may be paid; and, without prejudice to payment by any other method, payment of the fixed penalty may be made by pre-paying and posting to that person at that address a letter containing the amount of the penalty (in cash or otherwise).
However, later on under "1) Making payment" it does state the correct amount and the discounted amount. Whether this is misleading enough to get the PCN cancelled, I'm not sure. If it was, I'm sure it would have been the subject of appeals well before 2026, as the Act has been in force for many years.
