In 2026, the most significant change in UK airport rules is the lifting of the 100ml liquid restriction at major hubs like London Heathrow, Gatwick, Birmingham, Bristol, and Edinburgh. Thanks to a £1bn investment in advanced CT (computed tomography) scanners, passengers at these upgraded terminals can now carry up to two liters of liquids in their hand luggage and are no longer required to remove laptops or tablets for separate screening. However, it is a "split" system; some airports like Stansted, Luton, and Manchester still strictly enforce the old 100ml rule and the use of clear plastic bags while they complete their equipment rollouts. Travelers must also be aware that vacuum flasks or double-walled metal containers must still be emptied, as the scanners cannot penetrate the insulation. Because rules vary by terminal and airport in 2026, the official advice remains to check the specific guidelines for both your departure and arrival airports to ensure a seamless security experience.