Schoolchildren from across the capital will join the Duke of Edinburgh in a memorial service in Belgium today to honour fallen troops at the scene of some of the First World War's most deadly battles.
They will take part in the Last Post ceremony in Ypres on Armistice Day, where they will collect soil from Flanders Fields for a memorial garden at the Guards Museum in London.
It will be the 92-year-old Duke's first foreign visit since undergoing abdominal surgery in June, when he spent almost two weeks in hospital.
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On the lawns of the palace, thousands of people stood silently in tribute to the 22 people killed in the blast and the 59 injured.