I realise that this post may attract the ire of any motorists, but I personally feel that these people are complete idiots and thoroughly deserved to lose their case.
Anyone caught on a speed camera doing 47mph in a 30 zone is clearly breaking the law. Given that these days speed cameras are only put up in accident blackspots, they were being reckless too. Finally, given that every camera is well signed beforehand, painted bright yellow, and has little white lines on the road, they were probably too blind to be able to see where they were driving anyway.
I agree that not every speed limit is appropriate for the road its on all the time – for instance, I think faster speed limits could be introduced around schools out of term term, and in the evenings. However, there is a law, and like it or not, people should obey it or at least not be quite so blatant about breaking it.
I reserve the right to change my opinions if I ever get caught speeding.