Thanks for your replies! My grandfather is becoming a bit of a headache... (sorry g-dad!). My grandfather is down as "Arthur John Sullivan - father Arthur Sullivan" on his marriage certificate. How carefully were those details checked in 1919 I wonder? I believe now that the Sullivan was purely an assumed name so really need to find any possible siblings for Robert and Christina Wilson, born Liverpool. He always stated his father was a baker (which Robert Wilson was) and his mother was a Kelly (Mary Kelly I presume!).
I've been searching for any John/Arthur Wilsons born to Mary and Robert in Liverpool. Grandad had cousins in St Helens (believe I've found them in the 91 census).
Also trying to track Christina and Robert in the 91 or 01 census but they won't turn up! Robert joined the marines so he could have been at sea and Christina could have moved to Scotland.
My grandfather celebrated his birthday on July 5 each year and said he was "four years younger" than Nan (making his birth abt 1885). However just before he died in 1967 he wrote "I'll be turning 80 this September.." making his birth in September 1887! At least it's in the same quarter.

Those are about the only clues I have. He joined the Cameron Highlanders as a boy drummer and was stationed at Fort William ... but of course they have no "John Sullivan" on their roll. Now if I was sure I was after an Arthur or John Wilson ...??
By the time WWI came around he was going by the name of J Sullivan - that's the name on his medals. However he was identified by an officer at a railway station "Hello Wilson!!". He straight out said the officer had made a mistake but the officer replied that he didn't forget his men.
Hmmm. What lurks in his past?
