With space for close to 100 covers, Under's main feature will be a 36-foot panoramic widow looking out into the water. There will also be Champagne bar between the entrance and sub-aquatic dining room, where you can enjoy a glass of fizz before disappearing below the surface.
To ensure diners don't feel claustrophic, special attention wil be paid to lighting, and natural materials used throughout. The buildings thick walls will protect against whatever the sea has to throw at it.
Part restaurant project, part marine research centre outside of opening hours, the hope is that the concrete shell of the building will become a full blown artificial mussel reef that will attract further marine life.
Take a look at some renders below. Construction is due to begin February 2018, with a view to opening in early 2019.