Well if you want to join the Mugged Club, just cough-up like so many people do, but this PCN is outrageous, just a venal money-grubbing exercise. Trouble is, if you want to fight it, you must stand your ground and take them to London Tribunals and risk the full PCN penalty, where I would certainly expect you to win. All London councils are venal and rapacious and make millions from PCN penalties, and some make millions in double figures too.
WTAF is going on in Islington?
So it's a Magic Money Tree for them and this means they refuse virtually all representations against a PCN.
I suggest you submit reps on the basis of
de minimis, pointing out that your car clock does not give seconds, only hours and minutes, and an error of 1 minute would be a reasonable error. Point out that there surely has to be some commonsense applied.