"A senile clown", "Bloodthirsty Guttersnipe", "Undisciplined Swine", "Gangster", "Drunkard"... Adolf Hitler and Winston Churchill clashed for years in public as their opinions of each other and feuding helped determine the course of the Second World War. As diplomatic and military episodes unfolded - both men analysed, commentated upon, and taunted each other with Churchill continuing to do so for many years after Hitler's death. Yet, until...