Sunbury comprises two areas. The area adjacent to the river is commonly known as Lower Sunbury, or Sunbury Village, and has a quaint, almost rural, atmosphere, while the area around and to the north of Sunbury Cross, where the M3 begins, is properly known as Sunbury Common. It is more urban and is home to a number of large companies including Chubb and BP, as well as a mixture of national and local traders including a 1960s shopping centre and a large Tesco Extra superstore. Marking the western border of Sunbury is the Queen Mary Reservoir which was constructed in 1925. This is also home to a sailing club and is regularly used by local schools and youth organisations to teach water sports skills. Lower Sunbury has become increasingly popular with young first time buyers looking to start families. The mixture of Victorian terraces and 1930s semi detached houses in the leafy village offers a favourable and more affordable alternative to London. Lower Sunbury is usually defined as the area south of Sunbury Cross (Junction 1 on the M3). A conservation area within Sunbury village has been recognised to cover Thames Street and this reflects its historic buildings, many pubs, restaurants and a beautiful stretch of river bank leading up to the Church. Sunbury is a largely suburban town with a number of high-rise office buildings and industrial estates clustered around the M3 and the A308 (Staines Road West) and A316 (Country Way) trunk roads. Sunbury was previously the home of BP's Engineering and Research Centre, located to the north of Sunbury on the site of Meadhurst House, formerly owned by the Cadbury family. The site is now Sunbury Business Park and is home to a large number of BP's business units. A number of other companies, including Chubb, also have a presence. More on Sunbury-on-Thames