He was educated at Rugby and Christ Church, Oxford, and was called to the Bar, Inner Temple, in 1896.
He served as Minister of Labour under Ramsay Macdonald between 1931 and 1934. He practiced for some years at the Chancery Bar. He served under Stanley Baldwin as Parliamentary Secretary to the Ministry of Labour between 1923 and 1924 and again between 1924 and 1929.
When the National Government was formed in 1931 he was sworn of the Privy Council and made Minister of Labour under Ramsay Macdonald, a post he held until 1934, when he also retired from the House of Commons.
Betterton was appointed an Officer of the Order of the British Empire (Officer of the Most Excellent Order of the British Empire) in 1918 and a Commander of the Order of the British Empire (Commander of the Order of the British Empire) in 1920. He was made a Baronet, of Blackfordby in the County of Leicester, in 1929 and raised to the peerage as Baron Rushcliffe, of Blackfordby in the County of Leicester, in 1935.
Lord Rushcliffe was twice married. They had two daughters.
Rushcliffe died in November 1949, aged 77, when the baronetcy and barony became extinct.
31st United Kingdom Parliament. 32nd United Kingdom Parliament. 33rd United Kingdom Parliament.
34th United Kingdom Parliament.
35th United Kingdom Parliament. 36th United Kingdom Parliament]
Betterton was elected Member of Parliament for Rushcliffe in Nottingham in 1918.