Thank you for educating me, Jocko.
On a slightly different note. Had a story from my Brother in Canada. At some form of air show where of course the light aircraft is a bit more common than here. He was looking at aircraft when he noticed on one, that the hydraulic brake hose was rubbing on a wheel almost to the point of loosing fluid. When he pointed it out to the flyer, he received a very frosty reply. On checking other aircraft he found may similar faults. He was surprised at the lack of either understanding or just indifference. Hope Virgin/BA and the others are a bit more on the ball.