The two largest airports in the United Kingdom will install military-grade anti-drone systems to fend off rogue drones.

The administrations of the Heathrow and Gatwick airports, which are situated close to London, announced they will spend several million pounds to avoid any future disruptions to their operations caused by unidentified Unmanned Aerial Vehicles (UAVs). Heathrow is the busiest airport in Europe.

Gatwick Airport has already installed a preliminary anti-drone system. Heathrow isn’t far behind and its administration is working closely with the British military and law enforcement agencies to determine the best and most effective equipment to install.

“While I can’t go into detail about exactly what we have, I can confirm this was an investment of several million pounds to ensure we are at an equivalent level to that provided by the Armed Forces,” said a spokesperson for Gatwick.