Thank you for your replies. My grandfather, Harry Ashbery Aiken, was in the 1/9th London Regiment. I think they were all Territorials? The mystery is why he went to war in a London Regiment when he came from Belfast! I can place him there until late 1912 at least. He may have left his family then and gone to London - I don't know. How much extra training - if any - would he have got before going to France? I'm trying to get some info on his whereabouts 1912-14. Not easy!