On farmland in Wiltshire, investigators uncover one of Britain's most shocking cases of bird crime, after a tip-off leads to a secret camera catching a suspect in the act. As teams sift through horrific evidence of dead raptors, the scale of what could be the UK's largest bird of prey persecution becomes clear. In Northern Ireland, reporter Paul Colgan joins the Mourne Mountain Rescue Team to discover the challenges they overcome to keep hill farmers safe in some of the country's toughest terrain