London embassies open their doors to reveal art treasures

National Trust is offering behind-the-scenes tours of three European embassies housing a wealth of wonderful artThere are portraits of José, Prince of Brazil, the unfortunately nicknamed Maria the Mad, and Catherine of Braganza, the woman who helped make Britain a nation of tea drinkers.But why a drawing room in the grand London residence of the ambassador of Portugal houses an enormous portrait of a 17th-century English lady, Doddington Montagu, wife of the first Duke of Manchester, rema