It was, like most British factories, a pretty Dickensian place, it was still covered in flaking camouflage paint from the war.
We never actually killed anybody, more by luck (and personal awareness) than judgement.
We once (accidentally) fired a thing about the size and weight of a car engine out through the roof, in the direction of the West Coast Main Line that runs past the factory. First thing was to make sure it wasn't on the tracks, which it wasn't (phew!)- but, we just never found it. It didn't seem to have come down in the works and I climbed over the fence of the factory across the tracks, to an area where new cars were stored at the time, expecting to find a flattened car. The ground was quite marshy and we presume that it just went in and buried itself somewhere - it's a 'retail park' now and I wondered if we might find the bomb squad called when the old place was knocked down and the new tin sheds built, but nothing turned up - I often wonder where it is...