Independent (UK): Motorists are to be given up to £5,000 to buy less polluting electric cars in a long-awaited official drive to a low-carbon future. Under the £250m incentive scheme, drivers will receive Government subsidies to buy a new generation of cars that can be charged up by normal power sockets in homes and garages. Ministers promised that the funding — first announced as a concession for approving Heathrow’s third runway in January — would make green cars practicable for everyday …