Kelvedon Hatch is a village in civil parish of Kelvedon Hatch, in the Borough of Brentwood in south Essex, England. It is situated just north of Pilgrims Hatch, approximately to the north of Brentwood and is surrounded by Metropolitan Green Belt. In 2019 the built up area had an estimated population of 2,434. The parish had a population of 2,563 in 2001, reducing to 2,541 at the 2011 Census. It is home to the Kelvedon Hatch Secret Nuclear Bunker, the largest and deepest cold war bunker open to the public in South East England. The Coppice, Kelvedon Hatch, is a biological Site of Special Scientific Interest. History The name is recorded variously as Kelenduna, Kalenduna and Kelvenduna in the Domesday Book with the latter meaning Speckled Hill. From its early days in the Mediaeval period until the mid-20th century the main activity in Kelvedon Hatch was agriculture. Records from 1871 show 82 households, of which showed only 3 'white collar' households and 4 landowners or of independent means, with the majority of the rest engaged in a local agricultural economy. During the Victorian years, however, many younger people gravitated towards the main towns, encouraged by railway links at Ongar and Brentwood and the decline in the local 'agriconomy' has its roots in that exodus. Kelvedon Hall and other mansions First mentioned in the Domesday Book, the main estate building of the village was Kelvedon Hall. The manor was sold to John Wright, a yeoman from South Weald, in 1538 and it remained in the family until the early 20th century; the manor house was rebuilt in the 18th century by the seventh John Wright. In 1937 the property was bought by Sir Henry 'Chips' and Lady Honor Channon who restored the house and built the entrance gateway and lodges. In World War II it was used as a Red Cross convalescent home. Other mansions in the area of Kelvedon Hatch are Brizes, originally built in the late 15th century with the current building on the site dating back to the 1720s; and Great Myles, named for Miles de Muntenay, dating back to the Domesday Book but was largely demolished in 1837 although a few subsidiary buildings remain today. To the west of Kelvedon Hatch in Navestock Parish lies Dudbrook Hall, once owned by the Waldegrave family and which dates back to 1602. During World War II it was used to