Lowest price anywhere albeit not necessarily the lowest price ever.
Still, could be useful for somebody :)
The Masterplug IP rated Extension cable reel is one of a family of performance IP rated outdoor power products. They provide a convenient and safe temporary outdoor power pint for equipment such as DIY and Garden tools.
The Outdoor Power 20m 13Amp IP rated Case reel has 2 weatherproof sockets. It provides convenient & safe temporary outdoor power sockets, ideal for use with DIY tools or garden equipment. The sturdy portable case reel is the ideal gardening partner. The Sockets are IP54 rated in use and have protective flip down covers. The Cable reel has thermal cut-out Protectionfor added safety and is manufactured to BS EN61242.