My Harlow constituents strongly welcome the fuel duty freeze, and long may it continue. When wholesale oil prices rise, the cost at the pump rockets. The RAC and FairFuelUK have shown that average profit margins for diesel have increased by 150% in the past two years, with petrol margins at the pumps more than doubling. But when the global oil price comes down there is a feather approach; the savings are not transferred to the motorist. Will my right hon. Friend introduce a pump watch monitor to ensure fair prices at the pumps for motorists?