CG18631 | Payment of tax: UK representatives of non residents
From HM Revenue & Customs · Capital Gains Manual
TCGA92/S271A - S271J and CTA10/S969 - S972
Where
any liability to Capital Gains Tax, or to Corporation Tax on chargeable gains, can be collected from the UK representative of the non-resident person.
There is guidance on collection from UK representatives at INTM268000 onwards.