Two years ago, Transport & Environment (T&E) had already established that plug-in hybrids emit significantly more CO2 on longer journeys than advertised by manufacturers. New real-world tests with PHEVs in the BMW 3 Series, Peugeot 308 and Renault Megane, conducted by Graz University of Technology on behalf of T&E, confirm beyond doubt that lawmakers should base taxes for PHEVs on their actual pollution and stop subsidising their sale.