Berkeley was born in London to Humphry George Berkeley and Agnes Mary née Cheyne. He later went to Fiji where his father was a prominent lawyer in Suva. Then to Auckland, New Zealand, where he studied at Auckland University College and passed the Barristers Examination of the University of New Zealand.
He was educated privately and at Bedford Modern School.
He had trained as a lawyer He died in Los Angeles from pneumonia after an operation. He was admitted to the Bar of Fiji and New Zealand in 1912, and to the Middle Temple (London) on 2 July 1919.
He was a lieutenant in the 3rd (Auckland) Regiment of the territorials in New Zealand from 1911 to 1913.
Berkeley served in World War I as a captain in the Rifle Brigade. He was awarded the Military Cross in 1916.
His citation reads:
Foreign conspicuous gallantry in action. When his company commander was wounded, he led the company with great dash to its final objective, and later displayed great determination in consolidating the captured line.
Postwar he joined the staff of the League of Nations Union in 1919 as Editor of Pamphlets then Director of Propaganda, and the League Secretariat in 1921, resigning when he entered Parliament.
He was re-elected in another two-way contest in 1923, but did not contest the 1924 general election. Labour fielded a candidate for the first time in Nottingham Central, and the Conservatives retook the seat. He was defeated again in Aberdeen and Kincardine Central at the 1931 election.
These defeats reflected the national decline in the fortunes of the Liberal Party and the rise of the Labour Party.
His stage plays include The Lady With The Lamp (1929), based on the life of Florence Nightingale and starring Edith Evans in the title role, and The Manitoba I Killed (1931), which was adapted for the screen as Broken Lullaby the following year. His screenwriting credits include Dreyfus (1931), Cavalcade (1933), The World Moves On (1934), Carolina (1934) and Nurse Edith Cavell (1939).
He was residing at 606 North Crescent Drive, Beverly Hills.
32nd United Kingdom Parliament. 33rd United Kingdom Parliament]
He was elected as Member of Parliament (Member of Parliament) for Nottingham Central at the 1922 general election, winning the seat with a majority of only 22 votes over the sitting Conservative Member of Parliament Albert Atkey.
