"The Speaker last week spent four days in the United Arab Emirates on an official visit hosted by the authorities in the Gulf state.
He was accompanied by his wife, Mary Martin, whose business class flights to Dubai were paid by the British taxpayer.
Two parliamentary officials who accompanied the couple on the trip are said to have travelled in standard class seats.
According to one estimate the trip, including flights and accommodation in a five-star hotel, cost £8,000.
The trip reignited criticism of the Speaker, who oversees the system of parliamentary allowances and expenses that has triggered growing public anger against MPs' perks."