On Sunday, King Charles III will lead the services of Remembrance Day for the first time since his accession of the throne a few months ago.
The King and other Royalties will lay wreaths at the Cenotaph, the national war memorial in central London, as a tribute to the sacrifices made by servicemen and women
Remembrance Sunday is marked every year in the United Kingdom and it marks the following Sunday of Armistice Day which marks November 11.
Politicians, Royal Family members, and officials will wear poppies, in addition, two-minute silence observed at 11 am nationwide.
Big Ben will be struck 11 times to mark the start of the silence.
Around 10,000 veterans, including 100-year-old World War II veterans and servicemen who served in recent conflicts, will join the service.
Thousands of people are expected to line the streets to watch the service.
This year's ceremony is the first Remembrance Day since the death of Queen Elizabeth II who gave huge care to this day and considered it one of the most important and significant Royal engagements on her calendar of duties.
Defense Secretary Ben Wallace said: “We must never forget those who gave their lives in defense of our values and our great nation,"
He added: “All of us will also be thinking of those brave Ukrainians who are fighting for their very own survival to defend freedom and democracy for all, just as the U.K. and Commonwealth soldiers did in both world wars."