A FUEL discount that applies to the Scottish islands and the Isles of Scilly could be extended to rural parts of Northern Ireland, including Mid-Ulster.
The scheme, which was introduced last year, gives motorists a maximum 5p per litre reduction in duty.
The UK government is now looking at petrol and diesel prices in 35 areas in the four nations.
The European Commission (EC) would have to approve any change to the scheme.
Introduced in March 2012, the discount currently applies to the Hebrides, Northen Isles in the Clyde and the Isles of Scilly.
Fuel prices have been sought from almost 1,500 retailers ahead of making an application to the EC in the autumn for an extension to the scheme.
Businesses in Cookstown, Magherafelt and Dungannon have asked for information.
Chief Secretary to the Treasury Danny Alexander said the scheme aimed to keep fuel prices down where costs of transporting petrol and diesel were high.