Design students are stealing the thunder at this year’s Royal College of Arts summer show in London. Works on display range from textiles to technology – from futuristic cars to ultra-modern home appliances.One of the most simple, however, is an electric plug. It can change from two-pin to three-pin, with a simple twist. Its Korean designer has wasted no time in registering the patent. Another novelty is a jogging jacket that generates electricity from running. It uses the power to fuel lights in the back and sleeves. “Maybe people go running in the evening. This can therefore keep them safe when they’re exercising,” explains Nick Reddall, the inventor.