BT North Sea is a submarine cable system that comprises 2 individually distinct branches, North and South.

The North branch (Iceni) connects Eastern England (Winterton-on-Sea) to the Netherlands (Callantsoog). The Southern branch (Mercator) connect South Eastern England (Broadstairs - Joss Bay) to Belgium (Oostende).

The BT North Sea cable system will increase telecommunication reliability and diversity between the regions and increase data transmission capacity and speeds, helping to satisfy the growing demand for transmission capacity in Europe, The UK and the wider globe.

BT North Sea cable system is privately owned by BT, supplied by SubCom, to be ready for service in 2021.