Passport to Pimlico

Passport to Pimlico is a 1949 British comedy film made by Ealing Studios and starring Stanley Holloway, Margaret Rutherford and Hermione Baddeley. It was directed by Henry Cornelius.

When some local children roll a tractor tyre down a hole, it sets off an unexploded bomb left over from the Second World War in Miramont Gardens in the Pimlico district of London. The explosion reveals a buried cellar containing artwork, coins, jewellery and an ancient parchment document. Professor HattonJones Margaret Rutherford authenticates it as a royal charter of Edward IV that ceded the house and its estates to Charles VII the Rash, the last Duke of Burgundy, when he sought refuge there several centuries ago after being presumed dead at the Battle of Nancy. As the charter had never been revoked, Pimlico is legally part of Burgundy. Local policeman P.C. Spiller Philip Stainton is shocked to realise Blimey Im a foreignerThe British government has no legal jurisdiction and requires the Burgundians to form a representative committee according to the laws of the longdefunct dukedom before negotiating with them. Ancient Burgundian law requires that the Duke himself appoint a council. Without one, all seems lost until a young man from Dijon Paul Dupuis steps forward and proves that he is the heir to the dukedom. He duly forms a governing body one of its members is the shrewd shopkeeper Arthur Pemberton Stanley Holloway, designated Burgundys Prime Minister. ........

Source: Wikipedia