She was born and grew up in Darlington, England, attending a local comprehensive and a boys' public school in the sixth form.[1] Her directorial work includes documentaries, TV films, children's television (e.g. Numberjacks for the BBC), radio and museum voiceovers.[1] Most of her novels are set in the late 18th century and feature the tenacious detective pairing of Mrs. Harriet Westerman, a dynamic Sussex landowner, and her neighbour Gabriel Crowther, an anatomist of quiet renown hiding a baronial past.Robertson has been a candidate for the CWA Historical Dagger three times, for Circle of Shadows, Island of Bones and Theft of Life.[6][7][8] She has co-written three novels: she wrote King of Kings with Wilbur Smith;[9] she collaborated with US screenwriter Darby Kealey (a writer for Patriot) under the pseudonym 'Imogen Kealey' for Liberation, a World War II thriller about French resistance and SOE operative Nancy Wake, which is currently in movie production with Anne Hathaway as the lead character;[10][11] she wrote another thriller, The House, with former deputy leader of the Labour Party, Tom Watson.
