Using jammers is illegal without proper permits, I'd assume that government would authorize Heathrow to jam drones. The only illegal activity is by the person f

Using jammers is illegal without proper permits, I'd assume that government would authorize Heathrow to jam drones. The only illegal activity is by the person flying the drone whom they want to locate and arrest. If the jamming results in the drone crashing, well, that's not an issue - it would be also completely reasonable to directly destroy the drone by physically shooting it out of the air where it should not be.