Flech
You are quite correct in in thinking that it will take a death to get the BAA to move on this issue after all if someone is driving along the middle of the road how can the BAA be at fault ?.
The attitude of the BAA is that they don't give a damm if someone is killed as long as there leagal department covers the BAA's back.
The fact is that by now the BAA must know what a collision risk they have set up with these speed bumps and it is not an issue for them as the legal people see they have no liability.
I don't think I have ever seen a large public company that puts such a low value on human life just so some manager can save face for the stupid decision to install these things in the first place.