I don't think the disruption will be as bad as is suggested.

There's plenty of contingency.

- more than 60% of managers did not support this strike action

- each manager who comes into work will be paid a significant bonus

- extra qualified staff have been drafted in from global consulates and the Foreign Office

- the e-gates will still be functioning normally

- airlines have not been taking bookings into LHR for Wednesday since the weekend, so numbers will be naturally reduced

- it's a midweek outside school holidays; hardly a heavy travel day