Heliport,
Sorry, but you're wrong here. Prosecution is always the last resort, but a TRA is just that - Restricted airspace! It's there for a reason. If the pilot had flown through any Nuclear Restricted area, or firing range, or weapons area, he would also have been prosecuted. Same as he would have been if he had flown from North to South across the London CTR
Just imagine if the Microlight pilot flying along the coast had actually collided with the 9 RAFAT Hawks in the middle of the display! Nine Hawks into a crowd of 100,000 spectators would definately have made the news that night.
I think he got what he deserved..
FYI, he was one of about 5 aircraft who flew through the display, unfortunately, he was unlucky cos he got caught!