Can you post the images the right way up, please.
Two minutes would be within a de minimis consideration, in my opinion. After all, have the council shown you the time on a clock at the sign ? Of course not ! There was an adjudication a few years ago where the council said their CCTV clock was synched with an atomic clock so was accurate. They lost the case, and the adjudicator said there had to be application of common sense, as nobody had clocks in their cars that were so synchronised.
It really is about time this sort of thing was stamped on heavily, but who is going to do the stamping ?