Most of the "coded" information will relate to the actual medal rolls or his regiment [try searching for his card at the National Archives documents online at http://www.nationalarchives.gov.uk/documentsonline/medals.as... for full titles of regiment]. There’s a guide to interpreting cards at http://www.1914-1918.net/grandad/medals.htm , if there’s anything not covered there then post the details or preferably attach the card’s image to your post.