If a tree disease is already here and already spreading, why spend a penny defending against it? It is a fair question. Here is why keeping it out and keeping it down are two entirely different jobs.

What can a survey see that a walk over the ground cannot? A morning's flight in Sutherland turned up a feature a century of records had missed, and showed why you look before you break ground.

What can a drone actually tell you about a piece of ground? A morning's survey at Littleferry produced four layers of insight, and revealed a century of quiet landscape change.