[4][5] Birley was born in Shropshire and raised in Kensington[6][7] She was the daughter of Mary (née Hull) and Patrick Helmore, an underwriter at the Lloyd's of London insurance corporation.
[10][5] In May 1982, she was photographed wearing a medieval helmet and holding a falcon at Crumlin Lodge, outside of Inverin, Connemara for the cover of Roxy Music's album Avalon.
[11] She died of a self-inflicted gunshot wound on 23 July 2018, aged 58, while on holiday in County Clare, Ireland following what was described by her brother Ed Helmore as "a long battle with depression".
[1] Her husband announced her death in a joint statement with her children: "On Monday Lucy Birley (nee Helmore) passed away whilst on holiday in Ireland, surrounded by her beloved dogs, Daisy, Peg and Daphne.
Her husband Robin, and her sons – Otis, Isaac, Tara and Merlin – are understandably devastated and request that their privacy be respected during this difficult time".