Careless Driving - Rear Ended Another Car

I had an accident at around 6:30 in the morning, it was wet and dark and i was driving straight, then I saw a parked car in front, and i could not go into the left lane due to immense traffic and as i braked due to the slipperiness , there was no opening on the left lane. so i hit into the parked car. The fee written on the offense notice was set fine: $260 and the total payable was $400 is that correct i read somewhere else where the fee is $490 so I can fight the offense with that. Responses please totally shocked right now.

Case of City of London v. Young and one other one that I've mentioned in previous posts with that one (the name escapes me now) deal specifically with the issue of incorrect set and total payable fines. Search some of my previous posts for the names and links to the cases.