There’s an odd thing about this. We are constantly told that our vast, sour-faced and costly ‘security’ services, and various ‘British FBIs’ and ‘British KGBs’ are fully on top of the terror threat, and ceaselessly halting plots.

How is it then that they claim not to know if harmless aunties from Cleethorpes or Worthing are planning to manufacture an airborne bomb with the ingredients of a make-up bag?

Just in case such a person is a jihadi sleeper agent, she, and thousands of other innocents, must be treated as criminal suspects.

Like newly registered convicts, they must stand in humble queues, meek before arbitrary power.

They must remove clothing, allow strangers to peer at their nakedness in scanning machines, permit inspections of their private possessions and answer stupid questions with a straight face.

They must be compelled to accept this treatment without protest or complaint.

In fact, when we enter an airport these days, we enter a prototype totalitarian state, a glimpse of how it will eventually be everywhere if we do not find a way of resisting this horrible change.