The Queen and other members of the royal family will lead Britain in marking the 70th anniversary of victory over Japan.
A series of events will commemorate the sacrifices of British World War II forces who fought and died defeating Japan.
Police are encouraging people to continue with their plans to attend or take part in events as normal following media reports that extremists aim to explode a bomb in central London during the commemorations.
Buckingham Palace has refused to comment on the reported threat, with a spokeswoman saying they did not comment on security matters.
Proceedings in honour of VJ Day - Victory over Japan - will begin with a service attended by the Queen and Prince Philip, Prime Minister David Cameron, veterans, and former prisoners of war at St Martin-in-the-Fields Church.
Later, the Prince Charles and Camilla will be joined by veterans and their families for an event at Horse Guards Parade, featuring a fly-past of historic aircraft and a wreath-laying ceremony.
A highlight of that event will be actor Charles Dance reading the poem "The Road To Mandalay" by Rudyard Kipling.
The poem was famously set to music and was a favourite marching tune for many in the 14th Army in Burma, commanded by Field Marshal Lord Slim during the campaign.