No Pasaran! (They shall not pass).
Used during the Spanish Civil War at the Siege of Madrid by Dolores Ibárruri Gómez, a member of the Communist Party of Spain, in her famous "No pasarán" speech on 18 July 1936. The leader of the nationalist forces, Generalísimo Francisco Franco, upon gaining Madrid, responded to this slogan with "Hemos pasado" ("We have passed").
"¡No pasarán!" was used by British anti-fascists during the October 1936 Battle of Cable Street, and is still used in this context in some political circles. It was often accompanied by the words nosotros pasaremos (we will pass) to indicate that communists rather than fascists will be the ones to seize state power. What the connection between that and a suburban semi-detached house on the Crayford/Dartford border is a matter of conjecture. The pieces of jigsaw perhaps refer to the European Union.