Authorities in the U.K. today forbid airline passengers from taking electronic items such as iPods or laptops as hand baggage on flights. The ban follows the arrests of 21 people in connection with an alleged plot to demolish an aircraft in mid-flight while en route to the U.S, according to Macworld UK. Authorities also banned other items such as liquids and food, with a few exceptions. The rules pertain to all flights leaving or transferring through the U.K., according to the British government.