He died 27 May 2017. Obit from the Telegraph of 3 June 2017:
http://www.telegraph.co.uk/obituaries/2017/06/03/james-lionel-brooke-scion-white-rajahs-sarawak-obituary/He was s of Anthony Walter Dayrell BROOKE Rajah Muda of Sarawak (1912-2011), sometime head of the gentry family of that name of Sarawak, and his 1st w Kathleen Mary d of William Edward Cecil HUDDEN. He m 1982 (reg Q4 London) Karen M (b c1956 reg Q1 London) d of Desmon F LAPPIN and Ann M NOLAN, and had at least 2 sons: Laurence Nicholas (b 1983 reg Q4 London) succeeds his father as head of the family, and Jason Desmond Anthony (b 1985 reg Q2 London). Note the Telegraph obit says 'three' sons.