his army record will probably be available from ancestry.co.uk, he probably isn't on the CWG site as he is not buried overseas. his death certificate would be available from here:
http://www.gro.gov.uk/gro/content/
cost £9.00, just need the district year quarter and ref. if you can't get the details for applying yourself i could check, could check the war record too but would need name and date of birth