On a stifling hot afternoon in Miramont Place, Pimlico, an unexploded bomb is accidentaly exploded, revealing a hidden treasure trove, a painting and some mysterious documents. When the documents are translated by Professor Hatton-Jones of London University (Margaret Rutherford)the inhabitants of Miramont Place learnt to their astonishment that they live on land that belongs to the Duchy of Burgundy, granted to the Duke by Edward IV, and that they are technically Burgundians. At first they have a wonderful time being Burgundians, tearing up their ration books, burning their identity cards, and ignoring the licensing and betting laws, but trouble starts when black market traders start to flood into the area. Shopkeeper Stanley Holloway forms a governing comittee, which includes another local shopkeeper, delightful Hermione Baddley ,and the present holder of the title of Duke of Burgundy,a charming young Frenchman, turns up to claim his dukedom and court Stanley Holloway's daughter. Frustrated by the lack of cooperation in Whitehall, the Burgundians stop the underground trains that pass beneath Miramont Place, and make the passengers go through customs., "The Burgundians are a fighting people" as Margaret Rutherford triumphantly remarks "Consider what they did against the might of Louis XI!" Then Whitehall decides to close the border, and things get really tough for the Burgundians, with dwindling food and water, but they are determined to fight on and not be crushed by bureaucracy. This is an absolutely wonderful film, a brilliant and hilarious plot, wonderful comic performances, with Margaret Rutherford outstanding, and, unlike many of the later Ealing comedies, a cheerful and upbeat ending. By far and away my favourite British comedy.