Buy this photo Andy King and his family offer advice to visitors to their Purple Haze shop about the use of e-cigarettes E-CIGARETTE shop owners in Oxfordshire have said the Government’s endorsement of the safety of vaping could be a death-knell to their business. But they also fear, with a Government approval on the technology and the suggestion that e-cigarettes could even be prescribed by GPs to help people quit smoking, tobacco and pharmaceutical companies will start investing millions and muscle them out of the market.