another sister , mary churchill , now lady soames and the only surviving child of sir winston , had five children by her marriage to the late christopher soames -- nicholas ; emma soames , former editor of `` the tatler `` ; charlotte , now lady peel by virtue of her marriage to earl peel ; jeremy soames , an executive with the banking house of n. m. rothschild ; and rupert soames , chairman of gptelecom in paris .