“Both parties accepted that the legal approach to whether there is a 'discovery' is correctly set out in this first passage from the decision of the Upper Tribunal in Charlton v Revenue and Customs Commissioner[2012] UKUT 770 (TCC) at [37], where the tribunal said: '[37] In our judgment, no new information, of fact or law, is required for there to be a discovery. All that is required is that it has newly appeared to an officer, acting honestly and reasonably, that there is an insufficiency in an assessment. That can be for any reason, including a change of view, change of opinion, or correction of an oversight.' The UT continued in a second passage: 'The requirement for newness does not relate to the reason for the conclusion reached by the officer, but to the conclusion itself. If an officer has concluded that a discovery assessment should be issued, but for some reason the assessment is not made within a reasonable period after that conclusion is reached, it might, depending on the circumstances, be the case that the conclusion would lose its essential newness by the time of the actual assessment.' [61] I agree with the UT's approach in both passages.”