Families who live in desirable areas face massive increases in their council tax bills under plans being drawn up by Labour, it was revealed. Homeowners in affluent neighbourhoods with good schools, low crime rates and clean streets could be charged thousands of pounds extra than those in more run down places. Ministers have purchased sophisticated 'Big Brother' computer systems which calculate the desirability of an area based on the quality of local services and the types of people who live there. The software, which will be used in the forthcoming revaluation of all 21 million homes in England, contains astonishingly...