Drones were recently to participate in four serious near miss at UK airfields, the UK Air Proximity Board has said.
The board, which analyse near-miss happens in UK airspace, said a monotone has now come very close to crashing with a Boeing 737 clambering out of Stansted.
There were also category A incidents at Heathrow, London City and Manchester.
British Airline Pilots Association( Balpa) spokesman Steve Landells said action must be taken to prevent a “catastrophic crash” of an aircraft.
The Department for Transport( DfT) said it was working to create a “regulatory framework focusing on safety”.
The UK Air Proximity Board( UKAB) looked at seven occurrences implying dronings in its December report, four of which were classed as the most serious category A where a serious risk of conflict subsisted.
The near miss at Stansted experienced a drone move over the Boeing 737 by about 16 ft, as the aircraft was at about 4,000 ft during take-off.
In another incident, a droning narrowly missed affecting the backstage of a Boeing 777 shortly after take-off from Heathrow Airport on 22 September.
This took place at 2,000 ft – redouble the law altitude restriction for monotones transmitting live video to their operators.
According to the plane’s pilot, the monotone narrowly passed down the right-hand line-up of the aircraft and left no time to take action.
The UKAB concluded that the drone was at the same meridian and within 25 m of the spray, representing “chance had played a major part” in the lack of a collision.
Although the incident was reported to the police, the droning hustler was not traced.