A BA source said: ‘Mixed fleet crews are basically kids of 18 and 20 years old, in their first jobs on pretty low pay, who think it’s a wonderful life staying in posh hotels.
‘They pilfer champagne from the aircraft to drink in the crew hotels because buying their own drinks in a five-star hotel is too expensive.
‘Then they run amok, holding wild room parties and going topless in the pool.’
Crews on long-haul flights to the Kenyan capital Nairobi have been told the route could become ‘financially unviable’ unless they rein in their behaviour.
BA flies thousands of passengers a month to Nairobi, and the route is worth millions of pounds.
But in an internal memo sent to BA captains recently, a manager warns: ‘We continue to receive complaints from our management team at our crew hotel in NBO [Nairobi] regarding the behaviour of some of our crews.
‘In the current security environment, the current hotel is the only approved hotel available to us.