Of course Farnborough's not even a pale shadow of what it used to be, and deeply depressing to reflect on the fact that few of the British aircraft that used to be there ever made any money anyway. A grand illusion really, but a lot of fun in the process.
But what on earth is going to happen on the public days, assuming that they intend to search everyone? If it's necessary on the trade days it's necessary on the public days, but how is anyone going to get in in less than 4 hours?