Mr Gleave said there was no way the men could control the fire and therefore "there is no way the offenders could have known what was going to happen".
In the previous year, according to the ORR study compiled by transport consultants Steer Davies Gleave, Teesside Airport had only 18 passengers, Dorking West had 22 and Denton had 52.
"Having property developers turn to trusts should act as a limit on overheating of the real-estate sector simply because the higher cost of capital leaves them with less options, " said Mr. Gleave.