Swinging pickaxes into the hardened ground and clearing piles of rocks and rubble, the dozen or so police officers began work on Tuesday in temperatures that later reached 20C.
Gathered on a remote area of clifftop scrubland a few miles from the Portuguese resort Madeleine McCann vanished from 18 years ago, one team dug into the earth next to an abandoned farmhouse under the watchful gaze of nearby journalists.