LONDON.- First World War veterans will be remembered at Windsor Castle in portraits by the artist Dan Llywelyn Hall. Two of the longest-surviving veterans, Henry Allingham (1896-2009) and Harry Patch (1898-2009), whose lives spanned three centuries and six monarchs, will be the subject of a small display in the Castle’s Drawings Gallery from 3 November (until 6 February 2011). The two studies for oil paintings and a limited-edition print will be shown alongside the poem Last Post by the Poet Laureate, Carol Ann Duffy, which was presented to The Queen last year. Henry Allingham was the world’s oldest man when, at the age of 113, he met Dan Llywelyn Hall in June 2009, a month before he died. During the First World War he enlisted as an aircraft mechanic with the Royal Naval Air Service, later the Royal Air Force, and was awarded the French Légion