British Airways Hand Baggage. All customers are permitted to carry one piece of hand luggage and one small item (handbag, laptop) on board. Hand luggage must not exceed 56cm x 45cm x 25cm and the small item must be no bigger than 40cm x 30cm x 15cm.Both items can weight up to 23kg each.. If your hand baggage exceeds the limit, it will be checked into the hold.

https://www.mybaggage.com/shipping/airlines/british-airways/