387Exclusion of double relief etcU.K.
(1)Interest for which relief is given under this Chapter is not allowable as a deduction for any other income tax purposes.
(2)No relief is given under this Chapter for any tax year for the payment of any interest taken into account in calculating the profits of—
(a)any trade, profession or vocation,
(b)any UK property business, or
(c)any overseas property business.
(3)If interest is so taken into account, no relief is given under this Chapter for any relevant tax year for other interest on the same debt or liability.
(4)A tax year is a relevant one if the interest has been taken into account in calculating the profits of the trade, profession, vocation or business of the tax year.
(5)For the purposes of subsection (3) all interest which—
(a)is capable of being taken into account in calculating the profits of a trade, profession, vocation or business, and
(b)is payable by the same person on money advanced to the person on current account,
is treated as interest on the same debt.
(6)It does not matter whether the money is advanced—
(a)on one or more accounts, or
(b)by the same or separate banks or other persons.
(7)The reference in subsections (2) to (4) to interest taken into account is a reference to interest allowed as a deduction in an assessment which can no longer be varied (whether on appeal or otherwise).