The concept of GAAP is placed on a statutory footing for tax
purposes by FA04/S50 for corporation tax and ITA07/S997 for income
tax. These sections mean that
However, this definition is adapted for the purpose of the
finance lease test so that where the person is not within the
charge to income tax or corporation tax because they are not
resident in the UK, or accounts are not prepared in accordance with
international financial reporting standards or UK GAAP, then
international accounting standards should be used (CAA01/S70N (3)).
The terms ‘UK GAAP’ and ‘international
accounting standards’ (the statutory term used, in effect, to
cover IFRS) are defined in FA04/S50 and ITA07/S997. It is unlikely
you will need to study these definitions because it should be clear
from the accounts which set of standards has been applied. However,
if it is not clear then it may be necessary to establish which
standard has been applied – which is a question of fact.