If it is unlawful, it was always unlawful. Whether a judge would decide that you had voluntarily decided to donate the money you paid in response to the penalty issued by Lambeth, or whether he would decide that you had the opportunity to appeal (on grounds that you would not have been aware of when you had the opportunity) and that the court will not unwind the statutory process, depends on how bent he is.
Within the judiciary, the "F" word is "floodgates".