Some BA CC are totally passive about the hand luggage problem. They just stand in the galley and make announcements about "we have a full flight today etc". They need to adopt the same no nonsense approach as Ryanair CC. The staff at the gate also need to use the hand luggage template. After all it is not supposed to be for decoration!
I shudder to think what will happen when BA add more seats without adding more room for the bags.