Benn became active in the Conservative Party, and stood in Battersea at the 1906 general election. In 1907, he was elected to London County Council, a post he held for four years. He stood in Battersea again in January 1910. In December, he was instead elected at Plymouth.
Benn moved to represent Plymouth Drake in 1918, and in the Birthday Honours that year was appointed to the Order of the British Empire as a Knight Commander (KBE). In 1921, he became the President of the Association of British Chambers of Commerce, a position he held until 1923, and also became the Chair of the National Unionist Association. In 1926 he was created a baronet, of Plymouth in the County of Devon. From 1927, he was the Director of the International Chamber of Commerce.
Benn lost his seat in 1929, and at the next general election in 1931 was elected for Sheffield Park, but then lost this seat in 1935. In 1936 he was raised to the peerage as Baron Glenravel, of Kensington in the County of London.
Styles of address
- 1858–1910: Arthur Benn, Esq.
- 1910–1918: Arthur Benn MP
- 1918–1926: Sir Arthur Benn KBE MP
- 1926–1929: Sir Arthur Benn Bt KBE MP
- 1929–1931: Sir Arthur Benn Bt KBE
- 1931–1935: Sir Arthur Benn Bt KBE MP
- 1935–1936: Sir Arthur Benn Bt KBE
- 1936–1937: The Rt Hon The Lord Glenravel KBE[a]
- Although The Lord Glenravel was a baronet, by custom the post-nominal of "Bt" is omitted, as Peers of the Realm do not list subsidiary hereditary titles.
- Entry for Arthur Shirley Benn in 'Geni.com' website (2019). https://www.geni.com/people/Arthur-Shirley-Benn-1st-Baron-Glenravel-KBE/6000000080002945078
- "Clifton College Register" Muirhead, J.A.O. p37: Bristol; J.W Arrowsmith for Old Cliftonian Society; April, 1948
- 'The Private Papers of Douglas Haig 1914-1919', edited by Robert Blake (Pub. Eyre & Spottiswoode, 1952), P.100
- "No. 30730". The London Gazette (Supplement). 7 June 1918. p. 6686.
- "No. 33191". The London Gazette. 13 August 1926. p. 5371.
- "No. 34252". The London Gazette. 4 February 1936. p. 730.
- Entry for grave of the 1st Baron of Glenravel in Findagrave website (2019). https://www.findagrave.com/memorial/38631088/arthur-shirley-benn
- Bruno, Stephanie (27 November 2004). "Luling Mansion Presides Over Neighborhood Near The Track". Picayune Times.
- Pine, L. G. (1972). The New Extinct Peerage 1884-1971: Containing Extinct, Abeyant, Dormant and Suspended Peerages With Genealogies and Arms. London: Heraldry Today. ISBN 0900455233.
- Michael Stenton and Stephen Lees, Who's Who of British MPs: Volume III, 1919-1945
- Hansard 1803–2005: contributions in Parliament by Arthur Benn
|Parliament of the United Kingdom|
| Member of Parliament for Plymouth
With: Waldorf Astor
|New constituency|| Member of Parliament for Plymouth Drake
James John Hamlyn Moses
| Member of Parliament for Sheffield Park
|Peerage of the United Kingdom|
|New creation|| Baron Glenravel