In 1953, Mr Louis John Druiff executed a trust deed for the benefit of his four biological children and their descendants. One of his children, Ms Dulcie Helena Harper, had no biological children but later adopted two children (the applicants) in 1955 and 1957. The trust deed used the terms "children", "descendants", "issue" and "legal descendants" without expressly mentioning adopted children. The applicable legislation at the time (1937 Children's Act) required testamentary instruments to "clearly convey the intention" to include adopted children, otherwise they would be excluded. After Ms Harper's death in 2017 as the last surviving child of the donor, her adopted children sought a declaration that they were beneficiaries entitled to her quarter share of the trust capital.