We have so many remembered sounds and hope 3 isn't too many?

When attending the infant's school together 1941-3 a German Plane flew over and the teacher's whistles all blew at the same time, while us children scurried down to the air-raid shelters.
Also during WW2 we could hear Steam Hammers forging Anchors for Warships, the same ones had made them for HMS Queen Elizabeth, Queen Mary and The Titanic.
A vivid one my wife has when a child, a large piece of hot shrapnel from 'friendly' anti-aircraft guns near where we lived came crashing through her neighbour's roof.
It landed on the baby's cot, but she had begun to cry so much her Mum had taken her to their own bed just before. And apparently, she rarely ever cried at night!
The house is still there with it's repaired roof, but not the baby as she is a Grandmother now.

We are still in touch with her by the way.