Mr Mustard had a PCN cancelled by Barnet Council parking management yesterday on the simple basis that they were acting ultra vires (outside of its powers).
For parking PCN (not for moving traffic contraventions or bus lanes where there is a 90 day guideline) where you have made 'formal representations' (just a challenge in plain English) against a PCN received through the post (as it acts in effect as the Notice to Owner) or where you have made formal representations after receiving a Notice to Owner the council get 56 days, starting with the date on which they received the said representations, to write and accept or reject them. If the council fail to respond they are deemed to have accepted the representations and the PCN cannot be chased further. (The fact that the public only get 28 days to respond to a Notice to Owner is an inbuilt system unfairness).
Mr Mustard had submitted the representations by email (you can do this to firstname.lastname@example.org - set a delivery receipt) on 15 June and that is day 1. The council therefore had to serve their response by 9 August. What they did was to post their negative response (Notice of Rejection of representations) on 9 August and service is, unless shown otherwise, presumed to have occurred on 11 August. The council were therefore late and their Notice of Rejection was an unlawful offer to make an Appeal to the Adjudicator or to pay £110.
Mr Mustard counts the days (is 8 weeks) on a printed calendar or uses a spreadsheet to calculate 56 days but there is a useful on line calculator here
and Mr Mustard has given you the worked example for 56 days from 15 June
As this calculator counts the start date you choose as day 0 not day 1 you only add 55 days and you should do the same with your chosen date.
Mr Mustard is now waiting to find out the answer as to why there are not systems in place to stop the council from breaking the law in the way they did. This case will not be the only one in which they have acted illegally, they just tried to defraud £110 from the wrong victim this time.