Warren Farm is a 61-acre (25 hectare) plot of Metropolitan Open Land located in Norwood Green (Southall) that was previously used as playing fields by local schools.

It was part of the Osterley Park estate and was acquired by the London County Council from the Countess of Jersey in April 1925.

[6] However nearly 10 years after first announcing their intention, QPR stated they no longer preferred Warren Farm for their training ground, instead moving to a site in Heston.

[8] The publication of the consultation results led to varying claims: proponents of nature reserve status suggested that majority view was in favour, whilst the council stated that the respondents to the survey were not representative of the local area.

[4] In January 2023 Ealing Council announced their intention to develop just over half of Warren Farm as a sports facility whilst also saying they would continue to provide land for the wildlife.

[16][17] On 27 February 2024, Ealing Council announced its intention to designate all of Warren Farm as a Local Nature Reserve.