On 7 November 2017, Gaia Pope-Sutherland left her aunt’s home in Swanage. She was alone without a coat, phone or medication for her epilepsy – and she was, quite clearly, in a state of high distress.

Four days after the 19-year-old was reported missing, Dorset police released CCTV footage that seemingly implicated her childhood friend Nathan and his grandmother in her disappearance. Both were arrested on suspicion of murder and were released without charge, but their reputations were left in tatters.

Meanwhile, Gaia’s clothes were discovered strewn across Dancing Ledge – a coastal clifftop near the family’s home. Another name came into the frame for Gaia’s family: a man, five years older than Gaia, who she’d been seeing. Further clues were also uncovered in her final social media posts.

Watch the trailer for Gaia: A Death On Dancing Ledge below.

Gaia: A Death On Dancing Ledge – this tragic BBC documentary explores the unexplained death of Gaia Pope-Sutherland