Re: Parking Ticket
I don't think parking opposite is a problem, apart from if there's a dropped kerb on one side of the road, there's most often a dropped kerb on the other, so allowing wheelchairs etc to cross.
If you were to park opposite a dropped kerb, that might place your car next to the one on other side of the road, so blocking it. It is a little difficult to explain all situations unless having needed to use dropped kerbs. The main thing though, is not to park next to one so that it blocks it from being used.
Another danger is that if parked across a dropped kerb and a wheelchair comes onto the road from the dropped kerb on the other side, they not may realise their exit is blocked by a car until they are out in the road.