Picture by Dave Wood
The floating algae at West Waterloo Dock means means the marine life has been killed. The same is at Princes Half-Tide Dock. The marine life kept the water clean. It violates the UNESCO agreement for World Hertitage Status which insisted the marine life is preserved. The UNIQUE marine life is vital to the dock waters. See the web site on the sig below and go to Filling in West Waterloo Dock.
It is also against the UNESCO agreement to fill in West Waterloo dock. The actual UNESCO text in also on the web site.