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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A weather warning is in place across the south-east with heavy rainfall expected. Elsewhere there will be plenty of sunshine around.