We’ve been warned about drones but can we prevent another Gatwick?

Waiting at the airport in Antigua on Friday evening with her 10-year-old son, Shemar, Shemika Simon must have wondered whether she would ever make it to Britain in time to spend Christmas with her family. Earlier in the week, Gatwick airport, her intended destination, had been plunged into chaos by the sighting of a drone hovering near its runway. Its reappearance on Friday did not bode well.