Capital gains tax – Computation of chargeable gains. The First-tier Tribunal (Tax Chamber) (the FTT) had correctly decided, first, that a discovery assessment made against the taxpayer by the Revenue and Customs Commissioners under s 29 of the Taxes Management Act 1970 had been validly made, and second, that the taxpayer had not been entitled to the losses he had claimed either under s 64 of the Income Tax Act 2007 or s 72 of that Act. Consequently, the Upper Tribunal (Tax and Chancery Chamber) dismissed the taxpayer's appeal against the FTT's decision.