Clearwell War Memorial (General)
There's some inconsistencies here.
The 1939 register, as Chris has stated, shows a William Worgan living at number 3. This William is aged 58 and his wife, Agnes, is aged 63, so I assume they didn't have a daughter in 1939 so this is not your grandparents. Correct me if I'm wrong.
At number 4, a family by the name Powell is living. So I assume this is not your grandparents either.
Can you clarify?
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Peter