CPZ is a bad idea. I lived in Notting Hill before East Dulwich and it was a nightmare as Westminster wouldn't issue temp parking permits when you had visitors so no one who came to see us could park anywhere near our flat. I also lived on a non controlled street surrounded by controlled streets in Islington. You see, they do CPZ by street so one street may opt in and the next not. What happens is those who don't want to pay for parking outside their own house, then park around the corner on the non controlled street making it near impossible for that streets residents to park near their home, and the controlled streets are empty of cars. East Dulwich is the first place in London i have lived (been here for 10 years) where there is no CPZ. I think it is brilliant and so do those who drive to visit me. Long may parking be free!