'Subject to the provisions of any other Act restricting or excluding an appeal to the House of Lords and of sections 27(5) and 32(5) of this Act, it shall be competent to appeal from the Inner House to the House of Lords-
'[38] The petitioner has a reclaiming motion before the court in the previous process and has a right to have it heard and decided upon. We must therefore decide what further remedy we should give to the petitioner. Counsel for the petitioner moved that, in terms of the prayer of the petition, we should grant leave to appeal to the House of Lords. He relied on case law to the effect that the defect in a decision that has vitiated in this way may be cured by an appellate court (cf Calvin v Carr , pp 589-591; Re Medicaments and related Classes of Goods (No 4) , Brooke LJ, paras 23-25). He accepted however that the court had an option to remit the case for a rehearing of the reclaiming motion before a properly constituted division.
'Now let us look at the nature of this statutory prohibition. As I read the statute it applies to interlocutory judgments, meaning judgments which are in substance interlocutory, not simply those that are in form interlocutory. A judgment may be interlocutory in form but final in substance as, for example, when it determines a liability to account, leaving merely the ancillary process of taking the account. The prohibition also applies where the judgment or decree is not on the whole merits of the cause.'
'The test of finality in substance is whether the case would have been equally decided in substance whether the interlocutor under discussion had been pronounced as it was or had been pronounced to the opposite effect.'