Thorne was born in Luton and graduated from Aberystwyth University (history) and from the Open University (Law). She set up a restaurant with her sister but now spends her time writing and making miniature furniture for collectors. She lives in Pembrokeshire, which forms a background for much of her writing, as does Luton. She writes psychological mysteries, or "domestic noir," and her first novel, A Time For Silence, was published by Honno in 2012. Motherlove and The Unravelling followed, also published by Honno. She has also brought out a book of short stories, Moments of Consequence. Her last novel, Shadows, was published by Endeavour in 2017. She's a member of the Crime Writers Association.