 In 1981, the site was proposed for commercial development, provoking an energetic campaign by the Chiswick Wildlife Group, formed in March 1982, which became the local branch of the London Wildlife Trust. The threat to the site was one of the first to be highlighted by the London Wildlife Trust on its formation in October 1981. The campaign led to a Public Inquiry in July 1983, which determined that the site should be devoted to nature conservation. This was the first time anywhere in the United Kingdom that a Public Inquiry had ruled in favour of nature in a city, and the Gunnersbury Triangle example became a test case.
