Overview
Mid Sussex is a local government district in the non-metropolitan county of West Sussex, England, within the historic county of Sussex. It contains the towns of East Grinstead, Haywards Heath and Burgess Hill.
The district was created on 1 April 1974 from parts of East Sussex: the urban districts of Cuckfield, Burgess Hill, and East Grinstead and nearly all of Cuckfield Rural, the far north-west of which was transferred to Crawley.
The district borders the Tandridge district of Surrey to the north, Wealden and Lewes districts to the east, and the City of Brighton and Hove to the south, all in East Sussex, and Horsham district to the west and Crawley, northwest, equally in West Sussex.
The Prime Meridian passes through the district. The district contains most headwaters of the River Ouse, Sussex and its largest body of water is Ardingly reservoir which is used by watersports clubs. The north of the area is the High Weald and has sections of Ashdown Forest.
From Wikipedia (CC BY-SA 4.0).