(1) In this section, "major change in the nature or conduct of a trade" includes -
(a) a major change in the type of property dealt in, or services or facilities provided, in the trade, or
(b) a major change in customers, outlets or markets of the trade,
and this section shall apply even if the change is the result of a gradual process which began outside the period of 3 years mentioned in subsection (2)(a).
(2) Where -
(a) within any period of 3 years, there is both a change in the ownership of a company and (whether earlier or later in that period or at the same time) a major change in the nature or conduct of a trade carried on by the company, or
(b) at any time after the scale of the activities in a trade carried on by a company has become small or negligible and before any considerable revival of the trade, there is a change in the ownership of the company,
relief shall not be given -
(i) under section 396 by setting a loss incurred by the company in an accounting period beginning
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