The Lady and the Highwayman (1988)

The young Lady Panthea Vyne (Lysette Anthony) falls in love with the handsome highwayman (Hugh Grant), who saves her from her brutal husband. He kills him in a fair duel. Later, when Charles II (Michael York) is reinstated as King of England, she attends the royal court. But here she becomes the enemy of the King's former mistress, and the plot against her thickens.