Might be talking at cross purposes here: per bag 20kg is so the bag can be safely handled by staff. When I fly between London and East Asia I shop around betwe

Might be talking at cross purposes here: per bag 20kg is so the bag can be safely handled by staff. When I fly between London and East Asia I shop around between different carriers and, in economy class, I'm normally offered up to two checked bags with a total weight of between 30 and 35kg depending on carrier and promotional offers.