The Prime Minister has led tributes to the "remarkable political courage" of the architects of the Good Friday Agreement in Northern Ireland, fifteen years after it was signed.
"It represented a massive step forward from what has gone before, a clear manifestation that politics and democracy would triumph over violence," he said.
"I have no doubt that the Agreement was a truly momentous event in the history of Northern Ireland.
"The Belfast Agreement was the platform to build a new, confident, inclusive and modern Northern Ireland, whose best days lie ahead. While we have come a long way, much remains to be done."
More top news
After a global IT crash caused chaos, BA says it aims to run a "near normal schedule" at Gatwick and the "majority of services" at Heathrow.
Georgina Callander's family said the government must "opens its eyes" in the wake of the attack.
Thunderstorms affect many throughout the rest of the Bank Holiday weekend.