If you want to fight this ticket then the place to go is the Pepipoo website. There are experts on there that will tell you exactly where you stand. They’ve helped me in the past so I recommend them 100%. The private parking section is here:
http://forums.pepipoo.com/index.php?s=bbf25a8c607966961877f95d01d7755d&showforum=60
Forgot to mention – their help is free ?.