At the Downing Street reception , Sir Humphrey reveals to the PM that the French are willing to drop the matter of the puppy and are willing to concede a 50 – 50 split of sovereignty within the Channel Tunnel , but only if all the signs and menus are in French before English . Then the Police Commissioner provides Hacker with news that the bomb at the embassy was planted by the French themselves in order to test British security . The PM confronts the French president over the matter , who protests that his government is always ignorant of its security agency 's activities . However , Hacker now has the advantage and gains the compromise he wanted over the Channel Tunnel . He instructs Sir Humphrey to draft a communiqué for release after the funeral , and the mandarin responds , “ '' Mais oui '' , Prime Minister . ” When the cabinet papers from 1984 were made public in January 2014 , it was revealed that a French security officer had smuggled two canisters of high explosive into the French Embassy in London , in advance of a state visit by President Mitterrand , intending to test whether British security would detect them . The two small containers of high explosive were discovered in the grounds of the Ambassador 's residence , and more explosives were discovered in the Grosvenor House Hotel where the security officer was staying . The British government was infuriated ( the incident happened a few days after the Brighton hotel bombing ) but decided not to publicise it
Brighton hotel bombing
Brighton hotel bombing
A Diplomatic Incident