Opened in 1993, Sovereign Harbour is a development of the beachland in the seaside resort of Eastbourne, to the east of the town centre. Formerly known as The Crumbles, the marina now consists of four separate harbours, a retail park and several housing projects with both permanent and holiday properties.
The marina was originally run by its developer, Carillion, until 2007 when it was bought by the Premier Marinas group, who also run several other marinas along the South Coast including Brighton, Chichester and Port Solent, among others.