Thank you, RoadRunner... we're going to try not to think about it.
Just thought I'd share something else, though. In all of the information we've seen, as far as the council are concerned, I don't exist. With regard to my mother, they say:
"Mrs xxx may be classed as a vulnerable person due to the suicide of her husband and son. As such she should be offered counselling so she can better understand how noise affects her neighbour."
It's just surreal... all of it.