Quote: The British Airline Pilots Association (Balpa) said it came as "no surprise" as the problem often goes unreported.
"British pilots want to make every flight a safe flight and tiredness is the biggest challenge they face," said general secretary Jim McAuslan.
"The CAA has been far too complacent about the levels of tiredness among British pilots and failing to acknowledge the scale of the underreported problem."
'Isolated incident'
He said the European Parliament was due to vote on Monday on new regulations that would "cut UK safety standards".
Balpa said the changes included:
allowing pilots to land an aircraft after being awake for 22 hours
pilots flying on the longest-haul flights with only two crew rather than the three at present
pilots being forced to work up to seven early starts in a row rather than the current three
The association circulated a survey of 500 commercial pilots suggesting half had fallen asleep on the flight deck and a third had woken up to find the other pilot asleep. | 
