4U.K.In section 87 of that Act (accounting method where parties have a connection), for subsection (2) substitute—
“(2)Where this section applies the debits and credits to be brought into account for the purposes of this Chapter as respects the loan relationship must be determined on an amortised cost basis of accounting.
(2A)The provisions of subsections (2B) and (2C) apply where subsection (2) applies, or ceases to apply, with the result that there is a change of basis of accounting for a loan relationship as between one accounting period of a company and the next.
(2B)Where for an accounting period (“the relevant period”) a company brings into account debits or credits determined in accordance with an amortised cost basis of accounting, having used a fair value basis of accounting for the immediately previous accounting period (“the previous period”)—
(a)any amount by which the fair value of the relevant asset or liability at the end of the previous period (“A”) exceeds the cost of the asset or liability that would be given at that time on an amortised cost basis of accounting (“B”) shall be brought into account for the purposes of this Chapter as a debit (in the case of an asset) or credit (in the case of a liability) for the relevant period, and
(b)any amount by which B exceeds A shall be brought into account for the purposes of this Chapter as a credit (in the case of an asset) or debit (in the case of a liability) for that period.
(2C)Where for an accounting period (“the relevant period”) a company brings into account debits or credits determined on the basis of fair value accounting, having used an amortised cost basis of accounting for the immediately previous accounting period (“the previous period”)—
(a)any amount by which the fair value of the relevant asset or liability immediately before the relevant period (“C”) exceeds the cost of the asset or liability that would be given at that time on an amortised cost basis of accounting (“D”) shall be brought into account for the purposes of this Chapter as a credit (in the case of an asset) or debit (in the case of a liability) for the relevant period, and
(b)any amount by which D exceeds C shall be brought into account for the purposes of this Chapter as a debit (in the case of an asset) or credit (in the case of a liability) for that period.”.