TSEM10275 | Non-resident trusts: trustees’ chargeability: Capital Gains Tax - trustees fail to pay exit charge
From HM Revenue & Customs · Trusts, Settlements and Estates Manual
If the trustees do not pay the ‘exit charge’ within 6 months from the time it became payable, a former trustee may be required to pay the unpaid tax and interest (TCGA92/S82).