River Thames swimming pools

Just saw this article in Gizmag and wondering if our Brit colleagues have anything to add.
http://www.gizmag.com/studio-octopi-river-thames-swimming-pools/30436/
http://www.gizmag.com/studio-octopi-river-thames-swimming-pools/30436/
We're all just carbon, water, starlight, oxygen and dreams
Comments
If you are after a little open air swimming maybe go up to the ponds on Hampstead heath.
Open-air swimming is internationally famous on Hampstead Heath with the Ladies’ Pond, the Men’s Pond, the Mixed Pond and the Parliament Hill Lido. The Ladies’ and Men’s Ponds are unique in the United Kingdom in being the only life-guarded open-water swimming facilities open to the public every day of the year.
http://www.cityoflondon.gov.uk/things-to-do/green-spaces/hampstead-heath/swimming/Pages/default.aspx