1921: The first motorcycle police went on duty in London.

1923: The Duke of York and Elizabeth Bowes-Lyon, later King George VI and Queen Elizabeth, were married in Westminster.

1964: The Rolling Stones released their first album.

1967: A Picasso painting sold for $532,000. It was a record price for a work by a living artist.

1968: The largest underground nuclear device ever to be tested in America, exploded in Nevada.

1982: Number One in the charts was Ebony and Ivory by Paul McCartney and Stevie Wonder.

1986: Radioactive material leaked from a damaged nuclear reactor at Chernobyl. The effects were measured thousands of miles away.

1999: Jill Dando was shot dead on the doorstep of her home in Fulham.