His father died in 1919, during his grandfather's lifetime, and Towneley-Bertie was thereafter styled Lord Norreys until he succeeded his grandfather, Montagu Bertie, 7th Earl of Abingdon, as Earl of Abingdon on 10 March 1928.
He was a family trustee of the British Museum, and High Steward of Abingdon.
On his death in 1963 he was succeeded in his titles by his half-cousin, Richard Bertie, 14th Earl of Lindsey.
[1] He married Elizabeth ("Bettine") Valetta Montagu-Stuart-Wortley, daughter of Major-General the Hon.
When the Countess died in 1978, she left all her possessions- with a value of over £1.5 million- to her lifelong friend, Joyce, the wife of BBC television news editor Tahu Hole.