Sir Philip Albert Gustave David Sassoon, 3rd Baronet, was a British politician, art collector, and socialite, entertaining many celebrity guests at his homes, Port Lympne Mansion, Kent, and Trent Park, North London. He served as a staff officer during the First World War, from July 1914 to November 1918.

Port Lympne, at Lympne, Kent is an early 20th-century country house built for Sir Philip Sassoon, 3rd Baronet by Herbert Baker and Philip Tilden. Completed after the First World War. Following Sassoon's death in 1939 it was bequeathed with its contents, including cars and planes, to Hannah Gubbay, his cousin. It was abandoned after the Second World War. In 1973, it was purchased by John Aspinall as part of an expansion of his Port Lympne Zoo. The house is a Grade II* listed building as of 29 December 1966.