Hi Kath,
This is all circumstantial, as suffolk-sue says, you need the birth certificate to be sure, but:
freebmd has a marriage for John Edward PIGDON Sep Qu 1903 Castle Ward and on same page is Mary Emily ARMSTRONG
In 1901 census there are only four PIGDON families living in Castle Ward and here's John Edward:
1901 census RG13/4818 fol.160 p.30
9 Algernon Rd, Lemington, Newburn Hall, Tyneside, Northumberland
Edward Pigdon head mar 42 Railway Signalman Newburn
Ann " wife " 38 Lemington
John E. " son 18 Colliery Clerk "
Robert J. " " 14 Office Boy "
Hope this helps, Barbara