Yes Jim. that's the site I meant, thanks. I've been looking at so many WW1 sites I got a bit mixed up!
In 1919 Charles signed up again for 2 years after 8 months in "civvy street". As far as I can tell from family rumour, about this time he went to Newcastle-on-Tyne, then on to Germany. He left my grandmother in Newcastle-on-Tyne with their one year old son and a very unfriendly landlady!