The UK "Figure Eight" type power cable features a C7 jack on one end and a UK 3-pin plug on the other. It's designed for use with figure-of-eight inlet devices such as the JustBoom AMP Power Brick.
C7 cables, more commonly known as "Figure 8" leads, are used for powering some low-powered appliances such as audio/video equipment, TVs and laptops.
Product rated to 2.5A.