So much has been written and broadcast about the Tudors that Henry VIII’s courtiers seem stars in their own right. We know their acts and allegiances, their loves and lies, their foibles and (often terrible) fates. Yet one lesser-known figure often lurks near the centre of court machinations while remaining beyond the spotlight. She is Jane Rochford, the focus of Philippa Gregory’s latest novel ‘The Boleyn Traitor’.