I was there that day, and can corroborate Mr Sharpholds version of events. After the lady steamed off, I had a look at the positions of the parked cars and struggled to understand what any possible cause for complaint might be. The thing that stood out was that the bus could easily pass without slowing down (and it did do on the way in), hence the grievance seemed to be that she'd had to reverse up the road rather than tucking into the parking bay. This particular complainant did seem far beyond reason and whilst I didnt hear the Sharpholds attempt at mediation, i suspect even Kofi Annan would have struggled here.
Anyway, I also concur that parking has been pretty desperate this year, so please be considerate. Remember, the option to be inconsiderate isnt really an option, so if you cant park off the road, dont park there. If everything viable is full then go somewhere else.