Britain left the country without customs.

Does the subject want to ask, "If you leave Britain, there will be no customs?" Yes According to the regulations of the British government, leaving Britain requires customs inspection. Whether going to EU countries, non-EU countries or returning to China, passengers must go through the inspection of British border management agencies before boarding the plane, including British customs, immigration and other relevant departments. The British Customs and Immigration Bureau will check the departure and boarding procedures of passengers at the exit port to ensure the legality of passengers' departure and the conformity of outbound articles.