David Cameron said in a statement:
Lord Ballyedmond was a towering figure in Northern Irish business life, and passionate about peace and good relations north and south, east and west.
He was a larger than life figure who was a great supporter of the Conservative party and a good friend to me.
More top news
Kirk Douglas, star of film classic Spartacus and one of Hollywood's last surviving Golden Age actors, has turned 100.
Addressing an audience in America, the former PM said of Europe's single currency that it was not working "as intended".
The countries lawmakers voted to impeach President Park Geun-hye in the wake of mass protests against her.