US President Donald Trump will join the Queen in Portsmouth to commemorate the 75th anniversary of the D-Day landings, on the final day of his UK state visit.
Theresa May will host 15 world leaders to honour the largest combined land, air and naval operation in history.
Figures from every country that fought alongside the UK will be attending.
Mr Trump said he was looking forward to going to Portsmouth to commemorate what “may have been the greatest battle ever in history”.
The countries being represented at the event have agreed to make a joint statement pledging to ensure the “unimaginable horror” of the World War Two is not repeated.
Called “the D-Day proclamation”, the 16 signatories – including the UK and the United States – commit to working together to “resolve international tensions peacefully”.
The UK prime minister will use the occasion to call for continued Western unity in tackling what she will call “new and evolving security threats”.
The commemorations to mark the Allied invasion of northern France come a day after Mr Trump had a series of political meetings as part of his three-day state visit to the UK.
The president used a TV interview to play down his earlier suggestion that the NHS would be included in post-Brexit trade talks between the US and the UK.
During a joint news conference with the UK prime minister, Mr Trump had said “everything is on the table” in future discussions between the countries.
But Health Secretary Matt Hancock was among several Conservative leadership candidates who said they would not allow the NHS to become part of any trade talks.
And later Mr Trump told Piers Morgan in an interview for ITV’s Good Morning Britain that he did not “see it being on the table”.
“Somebody asked me a question today and I said everything’s up for negotiation because everything is, but I don’t see that being… that’s something that I would not consider part of trade. That’s not trade,” he said.
Other things Mr Trump said in the ITV interview were:
People who fought in D-Day paid the “ultimate debt”. “That may have been the greatest battle ever in history,” he said. “Being at that site [Portsmouth was one of the key embarkation points on D-Day] will be very interesting”
He would have “no problem” with meeting Jeremy Corbyn another time after earlier revealing he had turned down a request to meet the Labour leader who he called a “negative force”
He had a long conversation with Prince Charles about climate change – referred to as “extreme weather” by Mr Trump – and was impressed with the prince’s “passion” for future generations
He clarified that he had called the Duchess of Sussex’s comments about him “nasty”, rather than calling her nasty
His mother “would have been very proud” to see him meet the Queen
“There’s always a chance” he might take military action in Iran, but he does not want to. “I’d much rather talk [to Iranian President Hassan Rouhani],” he said
On having the nuclear codes – “I think it’s a terrible responsibility but it’s a responsibility I’m prepared to handle”
On his ban on transgender people serving in the army – “It is what it is,” he said. “They take massive amounts of drugs, they have to… You would have to break rules and regulations in order to have that”