Putting aside the legality of this, I will tell you my opinion of parking on pavements in practical terms. When I was walking everywhere with shopping or walking the dogs, I found the ones with juat 2 wheels on the pavement allowed enough room to pass (even with a pushchair). What annoyed me is those that parked half their car on the pavement, and in some cases their driveway was sitting empty !!!.
As a driver, on some housing estates the roads are narrow so it makes it necesary to park 2 wheels on the pavement so cars can get through.. and what about the emergency services.. police, ambulance, fire engines.. they need easy access.
Common sense is the order of the day and what is practical. I wonder how many people are getting cheaper car insurance by saying their cars are garaged when in fact they couldn't get their cars in their garages because they are full of kids bicycles, washing machines, freezers, etc !!!!