
Oh, I think that there is no doubt that were you to transit airports then the time spent doing so would count as a day in the UK.
May I point out that in Morgan vs Cilento (2004), a case involving Anthony Schaffer the playwright, Mrs Minutolo, who had an affair with Schaffer, sought to have him declared domiciled in the UK so that she could claim under the 1974 inheritance tax act. Ex patriate pilots, a sub division of that professional group renowned for their lack of marital fidelity and constancy, should perhaps look to their affairs with greater consideration for the consequences of the future.
Unintended consequences indeed, but the ramifications of the present proposals will be apt to be far more far reaching than those who have promulgated them might ever have imagined.
Edit: I should have pointed out that Mr Schaffer was dead at the time of the court case concerning his past domicile. His heirs and assigns had the pleasure of fighting over his spritual whereabouts when he was alive whilst no doubt not caring too much about his final destination in the after life.