In 1897 Freeman-Thomas was appointed aide-de-camp to his father-in-law, who was then the Governor of Victoria, Australia. Upon his return to the United Kingdom, Freeman-Thomas joined the Liberal Party and in 1900 was elected to the British House of Commons to represent the borough of Hastings. He then served as a junior lord of the Treasury in the Liberal Cabinet that sat from December 1905 to January 1906.
In 1897, Freeman-Thomas was appointed aide-de-camp to his father-in-law, who was then the Governor of Victoria, Australia. Upon returning to the United Kingdom, Freeman-Thomas joined the Liberal Party and in 1900 was elected to the British House of Commons to represent the borough of Hastings. He then served as a junior lord of the Treasury in the Liberal Cabinet that sat from December 1905 to January 1906.