Brigadier Sir Otho Leslie Prior-Palmer, DSO (28 October 1897 – 29 January 1986) was an Anglo-Irish British Army officer and Conservative Party politician.

In the Sandown Park Grand Military Gold Cup of 1932, he rode "Master of Orange" and led in the early stages, before coming in second at the finish.

[6] However, he sued for and was granted a divorce in 1936 on the grounds of his wife's adultery with Edward Agar, 5th Earl of Normanton,[7] whom she subsequently married.

[8] His second wife was to be active in politics later as a Conservative and as Chairman of West Sussex County Council Education Committee.

In parliament, Prior-Palmer began his career by voting (along with many backbench Conservative MPs) against the large loan from the United States that the Labour government had negotiated after the end of Lend-Lease.

In the first month of the new Parliament, with a Conservative government once again, he was required to apologise after being overheard saying that the Labour frontbencher and former Minister Jim Griffiths "had never done a damned day's work in his life".

[19] Prior-Palmer supported abolition of capital punishment in an unwhipped House of Commons vote in February 1956, one of only 48 Conservative MPs to do so.

[20] He backed the Eden government on Suez, arguing that it took British and French intervention to get a United Nations force to come in.

[22] In February 1961, Prior-Palmer signed, but later withdrew his name from, a motion critical of the constitutional development of Northern Rhodesia.