“I start by reminding myself of the proper approach to the adopted in considering whether to grant a stay in the absence of agreement between the parties. Although neither party referred to it, I consider that the correct approach is to be derived from Revenue and Customs Commissioners v RBS Deutschland Holdings GmbH[2007] STC 814 where the Court of Session as the Court of Exchequer in Scotland held (at [22]) that a tribunal or court might sist, or stay, proceedings against the wish of a party if it considers that a decision in another court would be of material assistance (not necessarily determinative) in resolving issues before the tribunal or court in question, and that it is expedient to do so.”
“He received nothing and so avoided nothing and gained no tax advantage: if anything, the assessment gives him a tax disadvantage because it attempts to assess profits that he has never received and to which his entitlement lapsed on leaving the partnership. . .”
“(4) The Tribunal may allocate a case as a Complex case under paragraph (1) or (3) only if the Tribunal considers that the case — (a) will require lengthy or complex evidence or a lengthy hearing; (b) involves a complex or important principle or issue; or (c) involves a large financial sum. . .”
“In any case, it is clear beyond argument, we think, that the assessment of what is ‘complex’ evidence or a ‘complex’ issue within 23(4)(a) and (b) is a matter of judgment. The task of making that judgment is assigned to the tribunal whose decision, if made applying the correct principles, can be overturned on an appeal to the Upper Tribunal only if it can be said that no reasonable tribunal could have reached that decision.”