Thanks A and C. I've googed the full term and found lots of useful starting points.
One more question if I may : what is the relationship between 2000 engine hours /2500 hours / training (flying school) / public transport / aerial work? It was suggested to me that leasing my (hypothetical) aircraft to a school would be a way of off-setting some of the running costs, but some complications exist re engine hours - hence my further queries.
