Born in England, she was educated at the Convent of the Sacred Heart in Filey, Yorkshire.
During the Second World War, she worked in a bank and as a solicitor's clerk in London. Here she gained much of the information later used in her novels. Lana married Anthony George Bowen-Judd on April 25, 1946. They ran a pig breeding farm between 1948 and 1954. In 1957 they moved to Nova Scotia, Canada. She worked as a registrar for St. Mary's University until 1964. In 1961 she wrote her first novel, Bloody Instructions, introducing the hero of forty-nine of her mysteries, Anthony Maitland, an English barrister.
Her last years she lived with her husband at Niagara-on-the-Lake, Ontario.