The floating pool sank along with most of the South Bank Urban Design Strategy. I heard that the proposed site was in a navigaiton channel, but that could be malicious. Is likely to be replaced with a new pool/leisure centre at Doon Street behind LWT. South Bank Employers Group are the driving force. And I hear they have put together the £10 million needed.
The Doon St site is not popular with many who feel that the Elephant is more accessible for most people. And residents who feel a South Bank site would be crowded out by office workers not local kids. Southwark are supposedly still attached to the idea of the Elephant, but if the Doon Steet project goes ahead there is not likely to be the money for a second pool. And given the overall uncertainty about the area around the Elephant, it may be hard to push the site.
This is all based on local gossip, so can't promise any is true. But it seems as if swimming pools are a hot topic for those who plan the future of the area behind closed doors.