Before 1229, Heston was part of the parish of Gistleworth (Isleworth) before being taken by Henry III, who subsequently granted it to the Earl of Cornwall. It covered until the late 19th century creation of Hounslow from outlying parts of two adjoining parishes, . The close association pre-dates the town of Hounslow, when that was simply Hounslow Priory, the two parishes had long been associated: the medieval manor of Isleworth covered all of that parish and this. After Henry III died in 1316, Heston was owned by the Crown, and later by the wardens of St. Giles Hospital, until it was surrendered to Henry VIII during the Dissolution of the Monasteries. Elizabeth I granted Heston to Sir Thomas Gresham, and, after eating some bread made from locally grown wheat, insisted on a supply for her own personal use.