CG26220 | Arrival in and departure from UK: temporary non-residence: attribution of gains to settlor - year of departure 2012-13 or earlier
From HM Revenue & Customs · Capital Gains Manual
TCGA92/S86 provides that in certain cases a UK resident settlor of a non-resident settlement is assessed on the chargeable gains of the trustees, see CG38400+. Following the enactment of TCGA92/S10A a settlor who is temporarily resident outside the UK may also be assessed under Section 86 on gains realised by the trustees during his/her period of non-residence.
However, all or part of the gains realised by the trustees during the settlor’s period of temporary non-residence may already have been charged, under TCGA92/S87, to beneficiaries of the settlement who have received capital payments, see CG38570c. TCGA92/S86A provides relief in this situation by excluding the gains charged to beneficiaries under Section 87 from the extended charge on the settlor under Section 86.