The J-Wharf plans are billed as creating the social hub of the wider SA1 development, providing facilities for a 24-hour "work, live, play" lifestyle.

BBC: NEWS | UK | Wales | South West Wales | Waterfront 'loft living' unveiled

It currently employs around 1, 400 staff in the SA1 district but new premises in the city would have room for another 300 staff, if required.

BBC: Admiral's new HQ unveiled in Cardiff