The last time anything comparable to yesterday's tragedy occurred in the UK was the Farnborough disaster in 1952. The decision that day to continue the flying programme seems callous 63 years later - because our attitudes as a society have changed so very much.
I, for one, would not wish to speculate about the causes of what happened yesterday, but I would bet my last pound that it will lead to rule changes and new restrictions demanded by the tragic outcome - i.e., at least seven dead, who were going about their business on a public road beyond the airfield boundary.
As far as I'm aware, that makes it unprecedented in British aviation history: so whoever chairs the public inquiry is pretty much obliged to recommend measures to avoid anything similar happening again.
A terrible day - and my thoughts are with all those affected.