(c) Licensed to London News Pictures. 13/06/2014. Essex, UK. Southchurch Park, Southend on Sea. The boating lake favoured by model boat enthusiasts has been blighted by a green algae invasion. The local Unitary Authority of Southend are carrying out tests on it. It is believed to be sea Lettuce. Plans are afoot to ride the lake of this growth. A radio controlled hovercraft stuck in the middle caught up in the weed.Photo credit Simon Ford/LNP