"I thank you for your letter of18 December 1969 and can agree your suggestions. Your computations are therefore agreed for the chargeable accounting period ended30 November 1968 and the appeal is determined in accordance with section 510,Income Tax Act 1952 ."
"If an inspector or the Board discover - ( a ) that any income which ought to have been assessed to tax at the standard
"Save as otherwise provided in the Income Tax Acts or the enactments relating to the profits tax the determination of the General Commissioners or the Special Commissioners in any proceedings under the Income Tax Acts or the enactments relating to the profits tax shall be final and conclusive."
"Subject to the provisions of this section, where a person gives notice of appeal to the General Commissioners, the Special Commissioners or the Board of Referees against an assessment to, or a decision of any kind with respect to, income tax other than surtax or surtax, and, before the appeal is determined by the Commissioners or Board, the surveyor or other proper officer of the Crown and the appellant come to an agreement, whether in writing or otherwise, that the assessment or decision should be treated as upheld without variation, or as varied in a particular manner or as discharged or cancelled, the like consequences shall ensue for all purposes as would have ensued if, at the time when the agreement was come to, the Commissioners or Board had determined the appeal and had upheld the assessment or decision without variation, had varied it in that manner or had discharged or cancelled it, as the case may be."
"Your computations are therefore agreed for the chargeable accounting period ended30 November 1968 . . ."
"the point now in issue was not then raised nor was the question in the minds of either of the parties" and to another in the judgment of Wilberforce J. in Kidston v. Aspinall (1963) 41 T.C. 371, 388: "the question as to the right of the appellant's wife to take capital out of the settlement was not present to the minds of either the appellant or the special commissioners, and no possibility of an assessment following upon that right was ever discussed or ever raised."
"If the inspector had carried out his duties correctly, he could not possibly have accepted the proposal that losses in a trade which had ceased should be set off against those of a continuing trade."
"It is true that the actual point of law was never formulated. But I do not think that can be necessary. The section is dealing with agreements as to how an assessment shall be dealt with. It is not dealing with the formulation of points of law. We do not know why the inspector agreed the computation. He may have made an error of law or he may have misunderstood the facts or he may have failed to think about the matter at all. Subject to the question, which I mention later, as to whether the taxpayer has provided misleading information, I do not see why the circumstances that the inspector has made a mistake either of law or fact should take the case outside section 510. Essentially, the question is not why he agreed but whether he agreed. The purpose of the section must be to protect the taxpayer by producing finality, and Parliament, I would suppose, must have contemplated that the taxpayer would be protected, even though the inspector made some error in his assessment. That is a likely, if not the most likely, event in which the question of going back on the agreement would ever arise at all."