Do not foget that, unless memory plays false tricks upon the aged cranium, residency is a matter which has to be agreed with the revenue. You cannot simply decide that you are non resident and thus it becomes so! You need to have sorted this little matter out, with special regard to the strange UK tax year dates with the revenue before filing the appropriate tax return.
The same applies to domicile, which is a matter which should be of importance and concern to any foreign pilot, living in England, especially were he then to undertake overseas contract work.