I know the rules, there's a diagram.
My parents have lived in their house for more than 20 years. The two neighbours opposite them moved in about 5 years ago after that block of land was divided in two and two bungalows built.
My mother has had a horrible day at work, went to get her hair done as they're going on holiday in a few days and got home at 7:30pm and was approached by Red neighbour who complained about their car parked outside her property. She also had left this note. She was waiting for my mum to get home, and seeing as she was home two hours later than she normally would be due to her hair appointment she must've been waiting a long time 
The rant included 'when I moved in I told you you weren't allowed to park there!'
Red neighbour lives alone, parks in her garage and has a space on her driveway too. There is one parking space directly outside her house (the one she is Very Cross about) and three more outside Blue neighbour's house, and lots around the corner on the other road.
My mother did in fact move the car, and parked it outside their own house directly opposite Red Neighbour's driveway, making it still entirely possible but a bit annoying to get out of.
I'm very tempted to move the car back outside Red Neighbour's house once my parents head off on their holiday... we're staying with them at the moment, hence why I'm privy to all of the neighbourhood excitement.
Also, not U.K., hence why this has just happened.