81U.K.In section 270 of ITTOIA 2005 (profits of property businesses: income charged), after subsection (2) insert—
“(3)If, as respects an individual carrying on an overseas property business, the tax year is a split year—
(a)tax is charged under this Chapter on so much of the profits referred to in subsection (1) as arise in the UK part of the tax year, and
(b)the portion of the profits arising in the overseas part of the tax year is, accordingly, not chargeable to tax under this Chapter.
(4)In determining how much of the profits arise in the UK part of the tax year—
(a)determine first how much of the non-CAA profits arise in the UK part by apportioning the non-CAA profits between the UK part and the overseas part on a just and reasonable basis, and
(b)then adjust the portion of the non-CAA profits arising in the UK part by deducting any CAA allowances for the year and adding any CAA charges for the year.
(5)In subsection (4)—
“CAA allowances” means allowances treated under section 250 or 250A of CAA 2001 (capital allowances for overseas property businesses) as an expense of the business;
“CAA charges” means charges treated under either of those sections as a receipt of the business;
“non-CAA profits” means profits before account is taken of any CAA allowances or CAA charges.”