Police chiefs are investigating counter measures amid the “threat posed by drones” straying ito restricted London air space.
It comes as Met officers probe what was believed to be Britain’s first unmanned aerial vehicle strike against a plane, which was on a landing approach to Heathrow airport.
Scotland Yard said “an object believed to be a drone” hit the front of a British Airways Airbus A320 last Sunday lunchtime above Richmond Park.
There were 132 passengers and five crew on board the flight approaching from Geneva, which was at 1,700ft - the legal maximum height for UK drones is 400ft.