Was King George really mad? Could the American Revolution have been avoided? Does the play Hamilton get George III right? To find out Dan Snow spoke to historian Andrew Roberts, biographer of Churchill, Napoleon and now George III.

George III ruled through an extraordinary period of revolutionary change, political upheaval, war and scientific, industrial and technological revolution. However, he is now most famous for being the king who lost America and for his mental illness. These two events are undoubtedly important parts of his reign but is George III perhaps the most underrated monarch in British history?