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HMRC internal manual

Capital Gains Manual

HM Revenue & Customs
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Interests in possession: age of majority

The age of majority was reduced from 21 to 18 as from 1 January 1970 (Section 1 Family LawReform Act 1969, and Section 1 Age of Majority (Northern Ireland) Act 1969). Where,however, an interest arises under a will or trust deed made before 1 January 1970 (or, inEngland and Wales only, under a statutory trust of an estate of an intestate who diedbefore that date), the age of majority remains twenty-one for the purposes of interpretingthe will, etc; if the original instrument was made before 1 January 1970, but the interestarises under an appointment made on or after that date, the age of majority is taken aseighteen. See Begg-McBrearty v Stilwell, 68TC426.