"We are deploying significant resources - both in terms of officers and equipment - to monitor the airspace around Heathrow and to quickly detect and disrupt any illegal drone activity; some of which are as a result of learning from the incidents at Gatwick".
Departures at Heathrow were temporarily stopped after a drone was reported to have been sighted.
With travelers and United Kingdom authorities still reeling from the incident a few weeks ago involving drones spotted deliberately flying close to Gatwick airport, the country's second busiest, travelers find themselves stranded and planes grounded in part of the United Kingdom due to a drone sighting.
"Based on standard operating procedures, working with Air Traffic Control and the Met Police, we have resumed departures out of Heathrow following a short suspension", a Heathrow spokesperson said in a statement.
Arriving planes, however, continued to land at Heathrow.
Meanwhile, UK government introduced new police powers against drones flown near airports this week.
Transport Secretary Chris Grayling said: "We are in contact with Heathrow Airport concerning the drone sighting".
Heathrow Airport stopped departures following a drone sighting.
"This second drone incident in less than a month has shown how important it is that airports invest in drone protection technology immediately", Mr Strutton said.
The drone was spotted over Heathrow this evening and sparked chaos as dozens of flights were suspended.
Some 81 airlines serving 204 destinations operate out of Heathrow, located west of London.
Locals now get half a day's respite from noise when take-offs and landings switch to the opposite runway at 3pm, but Hacan claims this would be reduced to one third of a day.