Yes the Walkergate 51 address is from the 1937 marriage certificate between Mary A S Dixon and James Robison. So perhaps they moved from number 38. As for Mary A S Dixon, do you think she was just registered a week later than her actual birth date?
Thank you all for your help. I gave up over a year ago as I was not getting any where when searching for him, so your assistance today is much appreciated. I'm considering contacting the Northumberland Fusiliers Museum up in Alnwick to see if I can uncover any more information on his First World War Service. From his first service number, I think he may have been in 1/7 btn Northumberland Fusiliers.