She then decided to whip out a ruler to measure the sub and found her ... She jokingly tweeted: "Just got back to the office with my £3.80 "6 inch" @SUBWAY (where I've never bought from before ...

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She then decided to whip out a ruler to measure the sub and found her suspicions were correct, Devon Live reports. The sub, which she paid £3.80 for, turned out to be only four-and-a-half inches ...