Comyns Carr's expertise in National Insurance led him to co-author a book on the subject in 1912 to which
David Lloyd George wrote the preface. He was a member of the Liberal land inquiry committee of 1912 and also sat on the land acquisition committee in 1917. His ambition to become a Liberal
Member of Parliament (MP) led Comyns Carr to stand for Parliament on eleven occasions in all. He first stood for election in
1918 in
St Pancras South West against a
Conservative opponent who had received
the Coalition Coupon and fought the same seat again in
1922. At the
1923 general election Comyns Carr had his only success, becoming Liberal MP for
Islington East turning a Unionist majority of nearly 4,000 into a Liberal majority of 1,632 but he lost the seat at the
general election of 1924 like many other Liberals swept away as British politics seemed to be reverting to its traditional two party model. In 1928, he was Liberal candidate at the
by-election for the constituency of
Ilford and fought the seat again in the
general election of the following year. In 1930, Comyns Carr published an influential and controversial booklet,
Escape from the Dole, which gained him significant public attention. In it he queried the policy of spending large sums of money supporting the unemployed when the government could be investing in providing work for them. and in
1935 he suffered his heaviest defeat ever at
Nottingham East. In June 1936, he was elected to serve on the Liberal Party Council. He stood again in
1945 when he lost at
Shrewsbury. In October 1945, he was a candidate at another by-election, this time in the
City of London. ==Other public appointments==