A passenger was escorted off an easyJet plane by police after refusing to wear a mask and becoming "aggressive".
Police officers boarded the plane at Glasgow Airport following reports that a passenger was not complying with flight attendant's demands.
In Scotland, England and Wales wearing a face covering is mandatory on planes and it is recommended in Northern Ireland.
The passenger was escorted off the plane alongside another companion - who acted in a "very aggressive" manner and took off his own mask and confronted airline staff, Glasgow Live reported.
Fellow passenger Gisela Martinez said: "Just after take off, a woman was asked to wear a mask but was ignoring the airline staff.
"She was asked several times, but to no response.
"However the man she was with was aggressively arguing back - to the point where he took off his mask, stood up and confronted staff down the front of the plane.
"He was very aggressive in his attitude to the point that a few of us felt the flight might be turned back to Luton.
"However staff continued to remind him that this was part of the terms he had agreed to when purchasing his ticket and he sat down - unhappy, but compliant from then on".
Gisela, who lives in Glasgow, said the disturbance left those watching on alarmed.
"We were all kind of scared and confused by the situation," she added.
A Police Scotland spokeswoman said: "We can confirm that one man was issued with a recorded police warning in connection with a disturbance during the flight on an Easyjet flight from London Luton to Glasgow on Sunday August 30."
