He was a member of the Historic Buildings Council from its foundation in 1953, and until he succeeded his father as duke in 1970, he was the National Trust's administrator for Sussex and Kent, and later East Anglia.
Er war Mitglied des Historic Buildings Council von dessen Gründung 1953 bis 1984 und, bis er 1970 den Titel seines Vaters erbte, war er Verwalter des National Trust für Sussex und Kent, später für East Anglia.