Knee jerk reaction
Typical knee jerk reaction, making lawbreakers of kids and hobbyists while doing absolutely nothing to address the problem.
The issue isn't law, what the drones over Heathrow did is already illegal. The issue is that neither law enforcement nor the airports have any effective way to enforce the law.
If they even had drone operators on the payroll of the police and airport they could at least follow these drones as they returned home, get video footage of the owners, and follow them as ground police are directed to the location. And an industrial drone with a net has been shown to be an effective way to catch and disable a drone.
Focus needs to be on equipping the airports and law enforcement with the appropriate tools, not knee jerk and ineffective policy changes.