Editing Upminster (section)

==Geography==
{{Further|Geography of London}}
[[File:Upminster osm.png|thumb|left|Map of Upminster and environs]]
Upminster rises to about {{convert|200|ft}} above sea level to the north and is about {{convert|50|ft}} above sea level to the south.<ref name=introduction/> It rests on a layer of loam, above sand and gravel in the south and [[London Clay]] to the north. It is bounded in the west by the [[River Ingrebourne]] and there is a stream running east–west, just north of Corbets Tey that has been dammed to form a lake.<ref name=introduction/> It has formed part of the continuously built-up area of London since the 1930s<ref name=robson_26>{{cite book |title=The Government and Mis-government of London |last=Robson |first=William |year=1939 |publisher=Allen & Unwin |location=London | pages=26–27}}</ref> and is contiguous with [[Cranham]] to the east and [[Hornchurch]] to the west. To the north and south there is open land that forms part of the [[Metropolitan Green Belt]] and there are [[Havering parks and open spaces|open spaces]] formed by Upminster Golf Club and Upminster Hall Playing Field to the north, Upminster Park and Clock House Gardens to the south, and the Ingrebourne Valley linear park to the south west. The town is effectively divided into north and south parts by the railway line. The north is predominantly residential, with the southern part containing the main shopping area. Further south it becomes predominantly residential again. Upminster is a [[post town]] in the [[RM postcode area]]; it forms a long protrusion over the [[M25 motorway]] and additionally includes [[North Ockendon]], also in Havering, and [[Bulphan]] in Thurrock.<ref name=rm_guide>{{cite book | publisher=Royal Mail Group | author=Royal Mail | author-link=Royal Mail | edition=4 | year=2004 | title=Address Management Guide | page=168 }}</ref>