Non-metallic modular liquid retention structures; non-metallic flood defence structures; non-metallic barriers; non-metallic modular barriers; non-metallic flood barriers; non-metallic modular flood barriers; non-metallic temporary dam structures; non-metallic modular dam structures; non-metallic temporary and transportable structures and barriers; non-metallic temporary and transportable structures and barriers for retaining water; materials for assembling non-metallic flood defence structures; non-metallic materials for assembling flood defence structures, liquid retention structures, dams and barriers; modular liquid retention structures, made primarily of non-metallic materials; flood defence structures, made primarily of non-metallic materials; barriers made primarily of non-metallic materials; modular barriers made primarily of non-metallic materials; flood barriers made primarily of non-metallic materials; modular flood barriers, made primarily of non-metallic materials; temporary dam structures, made primarily of non-metallic materials; modular dam structures, made primarily of non-metallic materials; temporary and transportable structures and barriers, made primarily of non-metallic materials; temporary and transportable structures and barriers for retaining water, made primarily of non-metallic materials; materials for assembling flood defence structures, made primarily of non-metallic materials; materials for assembling primarily non-metallic flood defence structures, liquid retention structures, dams and barriers; components of primarily non-metallic flood defence structures, liquid retention structures, dams and barriers; non-metallic components of flood defence structures, liquid retention structures, dams and barriers; primarily non-metallic components of flood defence structures, liquid retention structures, dams and barriers; parts, fittings and accessories for the aforesaid goods.