Comyns Carr's reputation as a barrister was confirmed in a libel action brought by Horatio Bottomley against an associate named Reuben Bigland.
[1] Comyns Carr later began to specialize in the law relating to local taxation and as a result of appearing in landmark rating appeals he was engaged as counsel to government departments.
[6] At the outbreak of the First World War Comyns Carr he joined the Royal Naval Volunteer Reserve and later served on the staff at the Ministry of Munitions.
[7] 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 first stood for election in 1918 in St Pancras South West against a Conservative opponent who had received the Coalition Coupon[9] and fought the same seat again in 1922.
[1] In later life Comyns Carr served as chairman of the Foreign Compensation Commission (1950–1958) and was a president of the Institute of Industrial Administration and of the Association of Approved Societies.