BOAC
7. You then have to persuade a very experienced crew to use a piece of equipment with which they have little or no experience to make a high speed approach in marginal conditions. They must not enter this into the authorisation sheets or tell anyone at their base they are going to do this.
Walter
John Stalker was also a pain to the government of the time. They treated him badly, but they didn't kill him. If the conspiritors had such access to the aircraft and crew, they could have devised a far better and more foolproof way of killing them than inducing a visual illusion.