The Bletchley area is rich in Oxford Clay, which has long been used for bricks. Brick-making has taken place on the Newton Leys site and the surrounding area from the late 19th century, circa 1897. The brickworks were named Newton Longville Brickworks and were made up of two sites - Jubilee Brickworks which was located on what is now the south of the Newton Leys site, and Bletchley Works which was in the northwest corner of the development site, adjacent to the OxfordBletchley railway line. Jubilee Brickworks closed in 1978 and has since been used as farming land for the adjacent Slad Farm. The lake formed by clay extraction at this site was used by anglers for many years and was known as Jubilee Pit The developer has since renamed it Willow Lake. Phase 1, 2 & 3 of the Newton Leys development is in this part of the site. Bletchley Brickworks closed in September 1990 and was planned to be used as landfill, initially by London Brick Landfill, a division of the brick-making company which owned the site, and was subsequently bought out by Shanks & McEwan. Permission was granted in 2002, and the landfill site has been operated since 2004 by FCC Environment. The original claypits for the Bletchley Works closed in 1970 and have since become the Blue Lagoon Local Nature Reserve. In 1991, a plans to develop the unused parts of the brickworks and the adjoining farmland they owned at Slad Farm were created by The London Brick Company with input from Aylesbury Vale District Council, Buckinghamshire County Council, Milton Keynes Council, and Milton Keynes Development Corporation. Outline planning permission was granted in June 2006, and development is expected to be complete by 2021.
Parts of the site have a history going back as far as the Iron Age, an archaeological evaluation commissioned by the developer in 2006, found an area of occupation in the floor of a stream valley in the southern part of the site, just west of Willow Lake. This comprised at least one circular enclosure interpreted as either a roundhouse or stock enclosure, and a series of ditches, gullies and small pits and postholes as well as several spreads of occupation deposits including a significant find of Iron Age pottery.
Newton Longville Brickworks
Newton Longville Brickworks were located on land between Bletchley and Newton Longville and were made up of two sites - Jubilee Brickworks and Bletchley Works. Brick-making started onsite circa 1890s and ceased within 100 years. As noted below, both works have been demolished and their sites subsequently redeveloped as Newton Leys. Nothing remains of the original structures.
Jubilee Brickworks
Jubilee Brickworks closed in 1978 and was mainly used as farming land for the adjacent Slad Farm. The lake formed in the claypit at this site was used by anglers for many years and was known as Jubilee Pit. The lake is now known as Willow Lake.
Bletchley Brickworks
Bletchley Brickworks closed in September 1990 and was proposed for reuse as landfill, initially by London Brick Landfill and subsequently by Shanks & McEwan. Permission was granted in 2002 and the site has been operated since 2004 by FCC Environment. The original claypits for the Bletchley Works closed in 1970 and have since become the Blue Lagoon Local Nature Reserve.