Hi Mim,
That's certainly interesting! I've checked and cannot find a George Hayes born in Stockton (either Durham or Nth Yorkshire) in 1864. In fact, according to Free BMD and the LDS sites, there were only two around that time - one in 1860 and one in 1869, neither of them being born in Stockton.
I'm almost certain that all his siblings had married by this time and I know his mother had died, so he may well have been living in lodgings. I thought he might be somewhere with his father, Ralph, but drew a blank on that one. Incidentally, his father disappeared after the 1871 census and I've only managed to find him when he died in c. 1893.
Thanks again mim, I'll see what more I can dig up on George Hayes. If this is my grandad, I wonder what his name was in 1901?
swampduck