Ian Taylor and his wife Paula, who paid £1,300 (over $1,650), had to sit on the "filthy" plane floor during a TUI flight to Menorca, where they planned to spend their holidays, The Sun reported.
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The Taylors were offered "jump" seats by the flight attendants for take-off and landing, while their 10-year-old daughter Brooke was given the last seat.
Paula Taylor added, however, that the co-pilot had come to sit with them on the floor, thanking the family for their "co-operation and understanding".
Later, TUI offered them £30 as a "goodwill gesture", while the Taylors responded by offering having their tickets refunded. The company claimed that the incident was caused by a "last minute aircraft change".