The cost of using Kent’s most expensive council car parks is set to rise again despite calls for the sky-high rates to be slashed. Canterbury City Council (CCC) was earlier this year accused of “cashing in” by increasing hourly charges at its most popular sites to £3.70. For some car parks, this meant a hike of £2.10 an hour, with residents and traders criticising the decision and urging the authority to cut the rates amid the rising cost of living. Yet fresh proposals reveal the Labour-Lib Dem coalition now wants to put the fees up again – and add two more Canterbury sites to the most expensi…