Twenty five towns, chosen for the ground being worked in them

Base is Exeter, which puts most of Devon inside an hour and reaches Cornwall, Somerset and Dorset comfortably inside a working day. Travel within that range is part of the fixed price for the site rather than a separate line on the invoice.

Each page is written around three things that change from place to place and change how a job runs: the kind of project that gets commissioned there, the ground and relief the flight has to deal with, and the airspace overhead. A site under the Exeter Airport zone, a quarry on the edge of Dartmoor and a quayside regeneration plot in a North Devon town are three different flights before anyone opens a processing package.

If your site is not in one of these towns, it is still worth asking. The list marks where the work is concentrated, not the edge of where the aircraft goes.