I could see the Four Arches bridge from my bedroom window when I was a child. It was a good place to paddle and catch sticklebacks to take home in a jam-jar and add to the population in the old Belfast Sink that sat in the 'yard'. These days, I suspect the sticklebacks would have been happier left where they were.
Back then, at the bottom of the garden, the grass was kept mown (I'm told the same area is a mass of brambles now), and you could see humps and bumps -- some people claimed these were the tops of Anderson's shelters, and other that they were the evidence of ridge-and-furrow fields... I think ridge-and-furrow is more likely as Anderson's shelters beyond the boundary of the gardens would not have been very accessible. But whatever they were, courting couples in my teens found them very hospitable -- at the wong time of day, you had to avert your eyes as you walked from Brook Lane along the back boundary of the houses in Cole Valley Road.
Image used with permission and taken from Images of Hall Green Today where you'll find a number of other images of Hall Green Past and Present.