They won't stop Top Gear. It's too popular. It's just one of those knee jerk reactions that always happen after and big accident/disaster.
Remember after 9/11? no one was ever going to be able to make a film about airline disasters or exploding buildings again...yeah right.
Turns out RH was never that badly injured anyway. yes he had a brain injury but accoring to the news at 1 they held back details due to patient confidentiallity. He had bruising over the brain but no swelling and was pretty much all there, admittidley a bit shook up, after only a few hours.