“(1) ...where a member of the armed forces is – (a) in receipt of retired pay or a pension in respect of disablement the degree of which is less than 100 per cent; and (b) the disablement is such as to render him incapable, and likely to remain permanently incapable, of following his regular occupation and incapable of following any other occupation with equivalent gross income which is suitable in his case taking into account his education, training and experience he shall, subject to paragraph (3), be awarded an allowance for lowered standard of occupation at a rate not exceeding the appropriate rate specified in paragraph 8 of Part IV of Schedule 1…. (3) The aggregate rate of the member’s retired pay or pension together with the allowance under this article shall not exceed the rate of retired pay or pension which TC v SSD (WP)[2019] UKUT 409 (AAC) 4 would have been appropriate in his case if the degree of his disablement had been 100 per cent…. (6) In this article “regular occupation” means…. (b) …his trade or profession as a member of the armed forces on the date that he sustained the wound or injury, or was first removed from duty on account of the disease on which his award is based, or if there was not such occurrence, the date of termination of his service”
“Allowance for lowered standard of occupation under Article 15: Groups 1-9£3736 per annum Groups 10-15£71.60 per week”
“….(2) Subject to the provisions of paragraphs (4), (5), (8) and (9), any award under this Order may be reviewed by the Secretary of State at any time if the Secretary of State is satisfied that— (a) the award was made in consequence of ignorance of, or a mistake as to, a material fact, or of a mistake as to the law; (b) there has been any relevant change of circumstances since the award was made; (c) the award was based on a decision or assessment to which paragraph (1) of this article applies, and that decision or assessment has been revised”
“(5) An award under this Order may be revised by the Secretary of State to the detriment of a member of the armed forces only where the Secretary of State is satisfied that— (a) the award was made in consequence of ignorance of, or a mistake as to, a material fact, or of a mistake as to the law; or (b) there has been any relevant change of circumstances since the award was made; or (c) the decision or assessment upon which the award was based has been revised under paragraph (4)”
“(6) Subject to subparagraph (7) ….. where an award is adjusted upon review instigated by the SSD, the adjustment shall take effect from the date of the review. (7) Where an award is reviewed as a result of a decision (the “original decision”) which arose from an official error, the reviewed decision shall take effect from the date of the original decision and for this purpose “official error” means an error made by SSD or any officer of his carrying out functions in connection with war pensions, defence, or foreign and commonwealth affairs, to which no other person materially contributed, including reliance on erroneous medical advice but excluding any error of law which is only shown to have been an error by virtue of a subsequent decision of a court”
“Subject to Article 44(7), any condition or requirement laid down in this Order for an award, or the continuance of an award, or relating to the rate or amount of an award, shall, except where the context otherwise requires, be construed as a continuing condition or requirement, and accordingly the award, rate or amount shall cease to have effect if and when the condition or requirement ceases to be fulfilled”