Sealink was a ferry company based in the United Kingdom from 1970 to 1984, operating services to France, Belgium, the Netherlands, Channel Islands, Isle of Wight and Ireland.
Sealink was originally the brand name for the ferry services of British Rail which ran shipping services in the United Kingdom and Ireland. Services to France, Belgium and the Netherlands were run by Sealink UK as part of the Sealink consortium which also used ferries owned by French national railways (SNCF), the Belgian Maritime Transport Authority, Regie voor Maritiem Transport/Regie des transports maritimes (RMT/RTM) and the Dutch Stoomvaart Maatschappij Zeeland (Zeeland Steamship Company).
On 27 July 1984 the UK Government sold Sealink UK Limited to Sea Containers Ltd for £66m. The company was renamed Sealink British Ferries. In 1991, following a hostile takeover bid, Sea Containers sold Sealink British Ferries to Stena Line. The sale excluded the operations of Hoverspeed, the Isle of Wight services and the share in the Isle of Man Steam Packet Company.