Anne Sebba - biographer : talks about her book about Ethel Rosenberg who was executed for supposed espionage in 1953 and Wallis Simpson who brought about the abdication of the king in 1936.

Anne Sebba is a master of the biographers art. In this conversation she talks about two of her books.

Ethel Rosenberg was executed for aiding her husband Julius in his task of spying for the Soviet Union. The Rosenbergs had two young sons who were orphaned on that day - June 19 1953. Anne tells the story.

The other book has become a classic - 'That Woman'.

That woman was Wallis Simpson. Wallis became the person responsible for the abdication crisis in 1936.  So who was that woman and what did she want?