In 1827, the house and estate of c. 680 acres (known as Hanworth Great Park), including three farms was sold outright to Henry Perkins.

The ground floor has a central Portland stone, Doric, tetrastyle, fluted columned front porch, (a portico) with a frieze end cornice.

In front, 17 wide Portland stone steps lead to the house with plain balustrades and cast iron lanterns.

The first Pups, initially built at Whitehead's Richmond works, were flown from Hanworth aerodrome in early 1917.

In January 1924, Feltham Garden Suburbs Ltd acquired Hanworth Park and other assets of Whitehead Aircraft.

In 1925, the Union Construction Company (UCC) leased the southwest section of the former Whitehead works, for subsequent production of underground trains (1928), 'Feltham' metal-framed trams (1929), and trolleybuses (1930), and then closed in 1932.

In 1926, Aston Martin purchased buildings at the northern end of the industrial site nearest to Feltham, for car production that continued until 1956.

Following a financial loss in the first year, Sir Alan Cobham joined the board, and Colonel the Master of Sempill became chairman.

[7][9] London Air Park gained notoriety for garden party fly-ins ('aerial tea parties'), air pageants and air races, and often presence of celebrities such as Stanley Baldwin MP PM; Louis Bleriot; Sir Sefton Brancker; The Hon Mrs Victor Bruce; Barbara Cartland; Sidney Cotton; Florence Desmond; Amelia Earhart; Bert Hinkler; Amy Johnson;[10] Sir Philip Sassoon; C.W.A.

In 1933, the British Klemm Aeroplane Co Ltd was formed, and produced 28 BK Swallows and six BK.1 Eagles, in rented premises in the northeast section of the former Whitehead factory.

On 15 April 1936, the Aeronautical Corporation of Great Britain was formed, and built a modified version as the Aeronca 100 at Walton aerodrome, Peterborough.

Less significant production, and unsuccessful 1930s types unique at Hanworth included Angus Aquila, Arpin A-1, Broughton-Blayney Brawney, Pickering-Pearson KP.2.

Also included in the new company were the assets of National Flying Services Ltd, the owner of London Air Park, plus adjoining industrial premises built in 1917 by Whitehead Aircraft Ltd.

5 Elementary and Reserve Flying Training School RAF (No.5 E&RFTS), using aircraft types including Blackburn B-2 and Hawker Hart Trainer.

It also produced less-successful designs, including GAL.33 Cagnet, GAL.38 Fleet Shadower, GAL.45 Owlet, GAL.47 (AOP), GAL.55, plus GAL.56 experimental flying wing gliders.

GAL converted Hawker Hurricanes with catapult launching equipment for use on convoy escort ships, and for landing on aircraft carriers.

[16][17][18] After World War II, some GAL activity continued, including production of sections of Fairey Spearfish, and conversion of de Havilland Mosquitos for use as target tugs.

In 1956, Feltham Urban District Council purchased Hanworth Park, and the former GAL factory was taken over by Thorn EMI.

In the northern corner of the park, Feltham Community College and its playing fields are enclosed, and at the south eastern edge is a public sports facility once named Feltham Airparcs, but renamed in 2010 as Hanworth Air Park Leisure Centre & Library with the addition of the library.

[7][19] Some of the south end of the park hosts Feltham Rugby Football Club, and since 2001 it has been the home of Hanworth Sports F.C.