Petrol and diesel drivers are seeing relief at the pumps for the first time in months as prices are falling faster than they have all year. According to data from RAC Fuel Watch, a litre of unleaded is being sold for 136.15p on average – a fall of more than five pence since the start of September and 7p lower than a month ago. Diesel drivers are seeing similar price drops at the pumps, with average prices down 5p since the start of the month, helping motorists save around £4 when filling their tank completely. The sharp reductions in recent weeks means petrol and diesel are now at their cheape…