After small scale model trials and a review of the theoretical earth pressure and water
forces acting on the flood barrier structure, a full scale pilot trial was carried out in
September 2007, to demonstrate the basic construction and design principles. A convenient
site was made available by the Environment Agency adjacent to a lake at Lea Marston,
Warwickshire. Figures 4 to 11 illustrate the various stages of construction and operation of
the barrier. The barrier successfully rose and retained 600 mm depth of water.