It comes as the Competition and Markets Authority (CMA) watchdog found drivers paid an extra 6p per litre for fuel last year amid increased supermarket profit margins
Fuel retailers will be forced to provide up to date price information to drivers to prevent profiteering at the pumps, Downing Street has said.
Ministers will change the law to help motorists find the best prices more easily – and to monitor for excess profits.
Under the plans, pricing data will be made available for third parties to allow for the creation of price comparison apps and websites.
It comes as the Competition and Markets Authority (CMA) watchdog found drivers paid an extra 6p per litre for fuel at supermarkets last year as weak competition allowed stores to boost profit margins.