British Airways Baggage
If you want to take checked bagage on your trip you are allowed to take 23kg if you bought a ticket with-baggage fare. A checked bag can be up to 90cm x 75cm x 43cm including any bits that stick out, like the handle, pockets and wheels.
Cabin baggage
You can carry one cabin bag, weighing up to 23 kg with maximum dimensions of 56cm x 45cm x 25cm, plus 1 small bag up to 40 x 30 x 15 onboard the aircraft.