Drivers who buy meals at motorway service stations are paying at least twice the price they would at a supermarket, research has revealed.
A study by travelsupermarket.com found that a meal of basic sandwiches, crisps, a chocolate bar and a drink at a service station shop would cost a family of four £29, while they could get the same food for £15 at a supermarket.
A bottle of still mineral water might cost £1.27 at a service station, while it could be purchased for just 25p at some supermarkets.
A traveller would have to pay five times the amount of money for a sausage roll at a service station as at a supermarket, with the average cost being £2, compared with 40p.
Other comparisons include a standard tube of Polo Mints, which are 58p at service stations but only 17p at a supermarket; and a packet of Walkers Crisps, which averages 79p at a motorway stop but only 39p at a supermarket.
The study involved checking prices at 16 UK motorways service stations and comparing them with prices at supermarket Asda.
Bob Atkinson, of www.travelsupermarket.com, said: "Following the severe disruptions to air travel this year with snow, volcano eruptions and strikes, many people will be holidaying in the UK this summer or driving to ferry, cruise and rail terminals to avoid flying.
"It might take a bit more time and effort but taking your own food and drink really does pay. It is consistently cheaper to buy snacks, drinks and sandwiches away from the motorway service station at a UK supermarket."
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