DUP MP Sammy Wilson has hit out at "snoopers" after being pictured wearing a face covering below his nose while on board a flight earlier this week.
The East Antrim MP was flying from London to Belfast when he was photographed by a fellow passenger sitting nearby.
"On Wednesday night I sat one seat from Sammy Wilson on the Aer Lingus 1945 flight from London Heathrow to Belfast City," they told the Belfast Telegraph
"He sat the whole flight with the mask below his nose with no regard to wearing it correctly.
"It got further from his nose from when the plane landed to taking off," they added.
When contacted on Thursday, Mr Wilson said: "I can wear my mask whatever way I want. I was wearing a mask - full stop".
A DUP spokesman later added: "Face coverings have been mandatory on public transport since July 10 2020. Their purpose is to protect others rather than the wearer.
"The covering should be worn correctly over the nose, mouth and around the sides of the face.
"Elected representatives should set an example where possible. Mr Wilson should not have worn the mask in this manner on the aeroplane."
In September, Mr Wilson was caught on camera on the London Underground without a mask as he made his way to the airport to return home.
Mr Wilson was on a seat reading a copy of Private Eye magazine.
At the time, he said he had the face covering off for a brief period of time to answer a call on his mobile phone.
He denied witness claims he did not wear a mask for the entirety of his tube journey from Westminster to Heathrow.
Later in a statement to the Press Association Mr Wilson queried why the person who took the photograph on the Tube had not approached him directly on the train.
However, he told the Belfast Telegraph that, as a public representative, he had to expect getting caught without a mask.
DUP leader Arlene Foster was forced to deny she was a weak leader when later asked about the matter as she urged everyone to abide by the law and wear a face covering.
Mr Wilson has previously been outspoken about the wearing of face coverings, describing them as 'muzzles'.
In July he tweeted a photograph of himself in an ice cream shop in Co Antrim not wearing a mask, with the message 'you can't eat ice cream when you're muzzled!'
Earlier this month party colleague Gregory Campbell said he had "owned up" after being pictured wearing a face covering down on his chin at an airport.
The photo, taken at Heathrow, was circulated on social media, leading Mr Campbell to take to Facebook to address the matter.
A member of the public, who took the photograph, told BBC Radio Ulster's Nolan Show he saw Mr Campbell incorrectly wearing his mask, which was not covering his nose and mouth, for around 15 minutes.
The East Londonderry MP was with other DUP members waiting to board a plane for Belfast.
Mr Campbell later posted a response on social media and urged people to "keep safe, don't let your guard down" and to "own up when you do like I'm doing".