We can try as much as we like to increase safety and their will always
be somebody else who will tell us otherwise.

The recent train crash in London is a case in point. After another
simular crash in the same area a few years ago, people were lobbying get
the anti collision systems fitted. Not done, reason: No money.

There are many such examples. Another thing that gets to me is that
always something bad must happen before people jump up and take note.

Wagner's point well taken.
Quentin