 He inherited three baronies when his father died in 1965.The Barony of Mowbray is the third most senior barony in the Peerage of England, after the baronies of Ros and Despencer.However, since Georgiana Lady de Ros was female, and Lord le Despencer is also Viscount Falmouth, he followed his father as premier baron of England, losing that distinction in 1983 when Lady de Ros died and was succeeded by her son.