RAF West Ruislip was a Ministry of Defence site, located in Ickenham within the London Borough of Hillingdon.

The base was originally built as a depot for the Royal Air Force (RAF), split by what is now the Chiltern Main Line.

[3] Following a review of properties, the US Navy vacated the site in 2006 and it became surplus to the Ministry of Defence's requirements under Project MoDEL.

In 1917, the Ruislip site was revisited, and on 3 July was selected to house a depot for the Royal Flying Corps, under a military acquisition order.

By 13 December 1918, several sheds had been completed, as were the Officers' Mess, sleeping quarters and the Navy and Army Canteen Board.

[8] Between May and July 1918, military stores from White City, Wormwood Scrubs and Baker Street were moved to the site, with items kept in the completed sheds.

Hilliard did not accept the initial offer of £5,900, but agreed to sell by the eventual deadline of 17 January 1920, receiving the sum of £6,350.

A resident of the land, Mrs Saitch of Home Farm, had her tenancy cancelled on 29 September and was paid compensation by the military until 25 March 1921, although the authorities did not believe her worthy.

[10] Fairlight House, built in 1914, was included within the site and later became the residence of the Commander of US Naval Activities, United Kingdom.

During the rest of the decade, the Metropolitan Police provided a guard of eleven constables, eight of whom were housed in the sick bay.

[13] The Air Ministry placed an order in 1922 for the closure of the public footpath that ran through the site, providing £750 for the maintenance of nearby Green Lane where the path originated.

[15] The RAF established the Apprentice Clerks Scheme at the Records Office in October 1925, after an earlier trial in 1921 had concluded successfully.

Under the scheme, apprentices were trained in general administrative and accounting duties, practising shorthand typing in the depot while also acting as messengers in the Records Office.

Additionally, a Navy, Army and Air Force Institutes (NAAFI) canteen was built on the RAF Blenheim Crescent site on 6 May.

[19] In order to protect it from potential enemy bombing, the majority of the Records Office was moved to a temporary base in Gloucester on 10 May.

It was proposed in April of that year to convert the base to an Air Ministry Unit and transfer the operations of RAF West Drayton to it.

[25] The US Navy leased the site in December 1975 and constructed additional facilities for personnel and their families, including a bar,[26] filling station, post office, cinema, chapel, school, baseball diamond and a medical and dental centre.

[6] Following a review of facilities, the US Navy elected to vacate the West Ruislip site, beginning on 30 June 2006.

[31] The base closed during a ceremony on 28 September, in which the American flag and Royal Air Force Ensign were lowered.

Naval Activities, United Kingdom was officially stood down on 14 September 2007 at a ceremony at RAF Daws Hill.

[34] Outline planning permission was granted by the London Borough of Hillingdon in January 2009 despite local opposition to some buildings having flat roofs.

[37] A McCarthy & Stone tailored care living development received planning permission in May 2014, and is due to open in early 2016.