From the BBC :
A British Airways pilot has been grounded after allegedly failing a breath test as he was preparing to fly a planeload of passengers to London.
It is understood that the pilot, who has not been named, was held by Swedish police after being found over the alcohol limit just before the flight was due to leave from Arlanda airport near Stockholm.
The 79 passengers were told there were "technical difficulties" with the plane and were made to wait three hours for a new flight crew to be brought in.
The co-pilot was not able to fly the plane because he was helping police with their inquiries, although he has not been implicated.
It's a disciplinary offence for an employee to report for work impaired by alcohol
BA spokeswoman
BA insisted that the pilot, reportedly in his 50s and from the London area, had not been close to flying the plane.
"Any suggestion that the pilot was removed from the cockpit is simply untrue," the spokeswoman said.
She added that he has been removed from flying duties while a full investigation was carried out by the airline, in addition to the inquiry by Swedish police.
"We are extremely concerned to hear of this alleged incident," the spokeswoman said.
Investigation
She said BA had "very strict rules governing the use of alcohol" which amounted to a "zero tolerance" policy.
"It's a disciplinary offence for an employee to report for work impaired by alcohol and it is deemed to be gross misconduct, which can result in dismissal."
The spokeswoman said the pilot had been flown back to the UK, where he was "helping" with the investigation.
A spokesman for the Civil Aviation Authority said the current law was that "you shall not present yourself for duty under the influence of alcohol or drugs".
The CAA said they had the power to demand that any pilot with a UK pilot's licence undergo a medical assessment if suspected of being under the influence and may face the removal of their licence.