My sister, who is older than me, has lived in East Anglia for many years. We are estranged so I will give no clue as to her specific location or identity. When she first married, she lived very rurally with her two young children and her dog, a Golden Retriever. Her husband worked abroad a lot.
The house she lived in was large and quite modern but she discovered the grounds outside, including the orchard, had served as a mortuary during WW2. There were even remnants of stone slabs which we assumed had been used for laying bodies on. I'm not sure East Anglia was bombed much during the war, but I do think there had been airfields in the area so perhaps fatally injured airmen were taken there.
My sister had a lot of uncomfortable experiences during her time there but this one always stuck in my mind.
One dark evening, alone in the house but for the children in bed and the dog lying by the fire, the doorbell rang. As I said the location was rural. Her driveway extended down to a very quiet country lane and she had no close neighbours. The nearest residence was a very old country house hotel, over the wall from her and reputedly haunted.
When she tentatively answered the door, no one was there and she said there was no way anyone could have got to the end of the drive so quick. On top of that the dog, who was a normally friendly, bouncy fellow, accompanied her to the door but then cowered and whined behind her legs as she opened it. After checking no one was around she shut the door, feeling highly spooked.
This happened more than once while she lived there and always made the hairs stand up on the back of my neck whenever she told me it had happened.