This got Ten off on completely the wrong foot for me, and made me rather miserable for the rest of Christmas: Harriet Jones was one of my favourite characters and that incident was basically character bashing because RTD had to have his own Belgrano moment with a female PM (actually, Thatcher was a) not the person who gave orders for the Belgrano; and b) the captain of the Belgrano has confirmed that the Belgrano was actively a threat to British forces at the relevant time.)