‘...to stand as a creditor in relation to a money debt, a person must have some form of entitlement to it. That entitlement may be proprietary, ie an entitlement in rem, restitutionary or statutory ...But it may also be contractual.....’
‘[87]...the claim for payment of interest covering the cost of loss of the use of the sums paid by way of [ACT] is not ancillary, but is the very objective sought by the claimants’ actions....In such circumstances, where the breach of Community law arises, not from the payment of the tax itself but from its being levied prematurely, the award of interest represents ‘reimbursement’ of that which was improperly paid and would appear to be essential in restoring the equal treatment guaranteed by ...the Treaty.’
‘[96]......the Treaty requires that resident subsidiaries and their non-resident parent companies should have an effective legal remedy in order to obtain reimbursement or reparation of the financial loss which they have sustained and from which the authorities of the member state concerned have benefited as a result of the advance payment of tax by the subsidiaries. The mere fact that the sole object of such an action is the payment of interest equivalent to the financial loss suffered as a result of the loss of use of the sums paid prematurely does not constitute a ground for dismissing such an action. While, in the absence of Community rules, it is for the domestic legal system of the member state concerned to lay down detailed procedural rules governing such actions, including ancillary questions such as the payment of interest, those rules must not render practically impossible or excessively difficult the exercise of rights conferred by Community law.’
“[62]...Park J’s analysis was the correct way of looking at what happened in this case. It was the mistaken belief that group relief could not be claimed that led inevitably to the liability to pay ACT which, absent a valid claim to group relief, DMG was not in a position to dispute....But, as Park J was right to recognise, if the mistake about the availability of group income relief had not existed, the ACT would not have been paid. It follows that the payments were made under a mistake.”
‘....The common law accepts that the payee is enriched where the sum was not due to be paid to him,...’
‘[31]...Sempra paid the tax when it did in the mistaken belief that it was obliged to do so when in fact it was being levied prematurely. ....’
‘...there was no mistake by the Claimants about the lawfulness of the tax paid in year 2. It was lawfully due. The mistake was in year 1 in relation to the tax due in that year and the need for the set off of reliefs to reduce it. The connection between the payment of tax lawfully due in year 2 and the mistake in year 1 is not sufficiently direct to satisfy the requirements of causation in restitution. The loss is too remote.’
‘...But there is no relation between the measure that is used for the purpose of calculating a particular result and the quality of the figure that is arrived at by means of the application of that test....’
‘...the distinction through these cases is whether the payments were payments of profits, that is, were income, or were payments on capital account estimated in terms of interest...a good illustration is to be found in Glenboig Union.... in which it was held that the sum there awarded was in truth, though described as interest, only a method of determining the value of the fireclay sterilised in the hands of the company for which it was entitled to compensation. That was a payment on capital account; it was for the destruction of a capital asset, which was indeed the source of profits but could not be regarded as income.... ...the contention is that money awarded as damages for the detention of money is not interest and has not the quality of interest. ... the essence of interest is that it is a payment which becomes due because the creditor has not had his money at the due date. It may be regarded either as representing the profit he might have made if he had had the use of money, or conversely the loss he suffered because he had not that use. The general idea is that he is entitled to compensation for the deprivation....The essential quality of the claim for compensation is the same and the compensation is properly described as interest. Lord Simonds (with whom Lord Porter agreed) said: ‘...It is sufficient to say that in order to attract tax it must be established that the sum in question was income, and that it was that species of profit or gain which answers the description ‘interest of money’.... ....the argument is that...if it is damages, then it is not ‘interest in the proper sense’....this argument appears to me fallacious. It assumes an incompatibility between the ideas of interest and damages for which I see no justification. It confuses the character of the sum paid with the authority under which it is paid. Its essential character may be the same, whether it is paid under the compulsion of a contract, a statute or a judgment of the court...But the real question is still what is its intrinsic character, and in the consideration of this question a description due to the authority under which it is paid may well mislead.’
‘...the appellant contends that the additional sum....though awarded under a power to add interest to the amount of the debt, and though called interest in the judgment, is not really interest such as attracts income tax, but is damages. The short answer to this is that there is no essential incompatibility between the two conceptions. The real question, for the purpose of deciding whether the Income Tax Acts apply, is whether the added sum is capital or income, not whether the sum is damages or interest... ....It is not capital. It is rather the accumulated fruit of a tree which the tree produces regularly until payment....’
‘what matters is the nature or quality of the thing paid and not the source of the obligation to pay it’
‘[it] is not an annual profit or gain within Case VI. It is the sale of an asset – namely, his legal claim – for a price.’
‘Case VI sweeps up all sorts of annual profits and gains which have not been included in the other five heads, but it has been settled again and again that that does not mean that anything that is a profit or gain falls to be taxed.... ...[profits and gains in Case VI] must mean profits and gains ejusdem generis with the profits and gains specified in the preceding five Cases....’