(a) In this section -
'deductible finance costs outside the tonnage tax trade' means -
(i) in relation to a tonnage tax company, the total of the amounts that may be taken into account in respect of finance costs in calculating for the purpose of corporation tax the company's profits other than relevant shipping profits, and
(ii) in relation to a group of companies, so much of the group's finance costs as may be taken into account in calculating for the purposes of corporation tax -
(I) in the case of a group member which is a tonnage tax company, the company's profits other than relevant shipping profits, and
(II) in the case of a group member which is not a tonnage tax company, the company's profits;
'finance costs', in relation to a company, means the cost of debt finance for that company, including -
(i) any interest expense which gives rise to a deduction under section 81 or relief under Part 8,
(ii) any gain or loss referred to in section 79 in relation to debt finance,
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