Hi Sean, welcome to Rootschat
For information of this type you need to go to the library , i dont know which one that would be as i dont know the area where your father was born and/or go to the local records office and get a birth certificate for him as they have lots of useful info on them eg fathers name and address plus his father (your grandad) name.
Cencus information is not available after 1901 anywhere.
Could you not ask any family members if they know anything about him?
Good luck
Joe