Hertfordshire Gravel Pit

Workers dig into Hertfordshire's aggregate layers at this gravel pit and uncover two petty criminals' bodies, their flesh scarred by radiation poisoning. Forensic teams swarm the site, linking the corpses to Lennox's isotope murder via H37 explosive traces and a bogus company. Insecticide-laced mud on Lennox's shoes pins his final steps here. Boots crunch gravel as Brigadier's investigators probe the conspiracy's trail amid open scars of earth and lingering contamination fears.