Even with the best security checks at airports with flights to London’s Heathrow, it would be impossible for not one in hundreds of thousands to miss an explosive device.
Again, aircraft could crash on the city for other reasons.
We are talking about flights continuing for years and years, so the risk though small would be greatly multiplied and significant.
An airport in the Thames Estuary area as suggested by Boris Johnson may one day seem to be a chance regrettably missed.
The inquiry dismissed the idea out of hand. Admittedly it was not popular with the airlines.
There were other options.