A comprehensive review of the best carry-on luggage options in the UK for 2026 emphasizes the importance of choosing the right cabin bag to minimize carbon emissions and save on airline fees. The July Carry On luggage stands out as the best overall choice, while the Tripp Holiday 8 is highlighted as the best budget option, often available for less than its £100 retail price. Other notable mentions include the Carl Friedrik Carry-on X, recognized for its luxury design, and the Away Carry-On Flex, which offers expandable capacity. The review process involved rigorous testing, including an assault course to assess durability, maneuverability, and packability. The author, a seasoned traveler and product reviewer, emphasizes that cabin bags should fit within airline size limits, typically around 55-56cm in height, to avoid additional charges. The article also discusses materials used in luggage construction, with polycarbonate being a preferred choice for its durability and ease of cleaning.