I can understand the frustration some feel here about people quoting statistics all the time. They are two different subjects. If you are killed as a result of a road traffic accident, the police don't pop round to your family and say 'Terrible sorry, still, just a statistic you know'. They have to investigate why it happened and bring charges against anyone who committed an offence. The information will also form part of manufacturer and road safety research. It happens all the time because there are a lot of road traffic accidents. In the same way, if someone is killed at, or as a result of an airshow, yes it is an event with a low statistical probability but it happened and therefore the police, with technical and causal input from the AAIB, must investigate why and if any criminal action has to be taken against the pilot or the organisers. The CAA will then prescribe standards as (or if) necessary but as someone else inferred, I doubt they'll do all the examination, come to a conclusion and have a board member say 'Yeah but come on, what are the statistics of it happening again..'