“ 44. …it must be remembered that the starting point is that permission should not be granted unless the FTT is satisfied on balance that it should be. In considering that question, we consider the FTT can usefully follow the three-stage process set out in Denton : (1) Establish the length of the delay. If it was very short (which would, in the absence of unusual circumstances, equate to the breach being “neither serious nor significant”), then the FTT “is unlikely to need to spend much time on the second and third stages” - though this should not be taken to mean that applications can be granted for very short delays without even moving on to a consideration of those stages. (2) The reason (or reasons) why the default occurred should be established. (3) The FTT can then move onto its evaluation of “all the circumstances of the case”
“(1) An officer of the Board may enquire into a return under section 8 or 8A of this Act if he gives notice of his intention to do so (“notice of enquiry”)— (a) to the person whose return it is (“the taxpayer”), (b) within the time allowed. (2) … (3) A return which has been the subject of one notice of enquiry may not be the subject of another, except one given in consequence of an amendment (or another amendment) of the return under section 9ZA of this Act.” 37. Once an enquiry has commenced, it only comes to an end when it is completed in accordance with section 28A TMA 1970. Completion of an enquiry requires HMRC to send a “final closure notice”