That’s the title of a job I recently saw advertised on LinkedIn: Head of Perimeter Development, Heathrow Airport. 

It was posted in the days immediately following the shut-down of Gatwick Airport because of the (definite, probable, possible, maybe, don’t-be-daft) presence of drones in the airspace and, at first, I assumed it must be about building higher fences or installing anti-drone technology to create a more secure perimeter.  Or extending the boundaries of the airport to make it larger. 

And that made me think about coaching.  Perimeter development (I would call it boundary management in a coaching context) is one of the issues that comes up repeatedly.