The Transport Secretary has called for an investigation into "exploitative" motorway Fuel prices.
He said the UK's three biggest operators - Moto, Welcome Break and RoadChef - should be investigated to ensure drivers got a "fairer deal".
Roadchef said it did not set fuel prices. Moto said prices reflected the cost of building and running services.
In a statement, it said many of its forecourts were owned by fuel companies who set the prices to "reflect the complexities of motorway trading, such as round the clock opening."
A company spokesman stressed that "where the forecourt is owned by Moto, we match the fuel company's price."
It comes as millions of Britons are expected to use the motorways over Easter.
BBC News.