81 Travel between trades etc.U.K.
(1)M1Where a taxpayer (within the meaning of section 80) travels between a place where he carries on a trade, profession or vocation in the case of which section 80 applies and a place outside the United Kingdom where he carries on another trade, profession or vocation (whether or not one in the case of which that section applies) expenses of the taxpayer on such travel shall, subject to subsections (3) to (5) below, be treated for the purposes of section 74(a) as having been wholly and exclusively expended for the purposes of the trade, profession or vocation mentioned in subsection (2) below.
(2)The trade, profession or vocation is—
(a)the one carried on at the place of the taxpayer’s destination; or
(b)if that trade, profession or vocation is not one in the case of which section 80 applies, the one carried on at the place of his departure.
(3)This section does not apply unless the journey was made—
(a)after performing functions of the trade, profession or vocation carried on at the place of departure; and
(b)for the purpose of performing functions of the trade, profession or vocation carried on at the place of destination.
(4)This section does not apply unless the taxpayer’s absence from the United Kingdom is occasioned wholly and exclusively for the purpose of performing the functions of both the trades, professions or vocations concerned or of performing those functions and the functions of any other trade, profession or vocation.
(5)Where this section applies and more than one trade, profession or vocation in the case of which section 80 applies is carried on at the place of the taxpayer’s destination or (in a case falling within subsection (2)(b) above) at the place of his departure, the expenses shall be apportioned on such basis as is reasonable between those trades, professions or vocations; and the expenses so apportioned to a particular trade, profession or vocation shall be treated for the purposes of section 74(a) as having been wholly and exclusively expended for the purposes of that trade, profession or vocation.
(6)Nothing in this section shall permit the same sum to be deducted for more than one trade, profession or vocation in respect of expenses in computing profits or gains.
Marginal Citations
M1SOURCE-1986 s. 36