On This Day 31 October
 

1955: Princess Margaret cancels wedding
Princess Margaret calls off her plans to marry divorced Group Captain Peter Townsend.

1971: Bomb explodes in Post Office tower
A bomb explodes in the Post Office tower causing extensive damage but no injuries.

1984: Indian prime minister shot dead
Indira Gandhi, the Prime Minister of India, is killed by two assassins believed to be her own bodyguards.

1997: British au pair guilty of murder
A Boston jury finds Louise Woodward, 19, guilty of second degree murder for killing the baby in her care.