830Residence of individuals working abroadU.K.
(1)This section applies for income tax purposes if an individual works full-time in one or both of—
(a)a foreign trade, and
(b)a foreign employment.
(2)In determining whether the individual is UK resident ignore any living accommodation available in the United Kingdom for the individual's use.
(3)A trade is foreign if no part of it is carried on in the United Kingdom.
(4)An employment is foreign if all of its duties are performed outside the United Kingdom.
(5)An employment is also foreign if in the tax year in question—
(a)the duties of the employment are in substance performed outside the United Kingdom, and
(b)the only duties of the employment performed in the United Kingdom are duties which are merely incidental to the duties of the employment performed outside the United Kingdom in the year.
(6)In this section—
“employment” includes an office, and
“trade” includes profession and vocation.