Alongside Prime Minister David Cameron, Liberal Democrat leader Nick Clegg, opposition leader Ed Miliband and Westminster Plaid Cymru group leader Elfyn Llywd, as well as high commissioners from Commonwealth countries and leaders of the Armed Forces will attend today's service in London.
Thousands of veterans will also march through Whitehall to pay their respects at the Cenotaph.Last night Rod Stewart performed for the Queen at the Festival of Remembrance in honour of Britain's war dead.
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An ejector seat manufacturer is to be prosecuted over the death of Red Arrows pilot Sean Cunningham at RAF Scampton in November 2011.
Police said the "active shooter" had since been shot by officers and they were not seeking any other suspects.
Rain will continue spreading in from the southwest, remaining heavy, especially in western areas.