Hi,
I think this is his birth, Walpole St Andrew would have registered in Wisbech RD,
Arthur CHAPMAN Dec Q 1909 Wisbech 3b 499
and his marriage,
Arthur CHAPMAN Sep Q 1931 Downham 4b 867
Florence M A C PANKS
and possibly his death,
Arthur CHAPMAN Dec Q 1981 King's Lynn 10 1404
DOB: 28 Aug 1909
but I also can't 1911 census entry that matches him if his father's name is James

Oh dear, there is a 1 year old Arthur living in the Wisbech RD but his father's name is also Arthur, maybe you could get the marriage cert. to see what details it gives for his father.
Regards,
Daisy