Simplify the following text for a Grade 11 native English-speaking person.
Original: It is located on a former Docklands site , directly opposite the London Regatta Centre , in the London Borough of Newham in East London , England , and was developed by the engineering company Mowlem in 1986\/87 .
Simplified: It principally serves the financial district of London and is located on a former Docklands site , 6 N east of the City of London , opposite the London Regatta Centre , in the London Borough of Newham in east London . It was developed by the engineering company Mowlem in 1986\/87 .