Ruth Werner was born Ursula Kuczynski in Berlin.

She was appalled by Hitler and became a lifelong communist and a spy.  During the 1940s she lived around Oxford and radioed secrets to Russia.

Her spy codename was Sonja and her memoir was published as Sonja's Report. Ben MacIntyre wrote a best-selling biography of her ...Agent Sonya: Lover, Mother, Soldier, Spy.

David Freeman spoke to her in Oxford.