British Airways' carry-on baggage rules state that passengers can bring two carry-on bags onto the airplane. The two carry-on bags include one handbag or laptop bag and one additional bag.
Each passenger's handbag or laptop bag must fit underneath the seat in front of him. The second bag belongs in the overhead compartment. If the bag does not fit, it is placed with the checked luggage. All carry-on bags cannot weigh more than 51 pounds each. Any items bought at the airport are considered a carry-on.
Detailed information about carry-on restrictions, including size and weight limits, is available at BritishAirways.com. Click on the Information menu option. When the drop-down menu appears, choose the Baggage essentials option. Click on the Hand baggage allowances banner to view information about British Airways' carry-on policies.