The bottom line is fairly simple. IF they did execute barrel roll ivo Grantham whilst on a transit then, they should be hammered for it. Especially if it happened post Shoreham. If they had wanted to mess around, they should have done it feet wet where they would have been the only who would have suffered had it gone wrong.
Insenstive to recent events and foolish.
I don't think you can compare it the the accidental Victor take off...