Found this on Jane & Richards:

BBC News: Plans to create sunshine island
“The holiday resort, named Pleasure Island, would be based two thirds of a mile off the coast of Brighton, between the city’s two piers.

Architect Alan Phillips, from Alan Phillips Associates Ltd, said the artificial island, which is covered by a glass dome, would be filled with “sunlight” 24 hours a day, 365 days a year. He said he chose to create a floating resort as the city was becoming increasingly cramped. “After all Brighton is full up now and you cannot fit anything else in and everything we do as architects is about building here and here and here. “I think a new island is fine and it will give Brighton a bit of breathing space.”

I know what he means, it does feel cramped here. Especially in summer.