The regimental War Diaries are held at The UK National Archives and as of April 2020 have been made available for free download*. They are the official unit war diaries for the British Army that contain records of daily activities, including casualties. They are not personal diaries.
* you will need to register for an account and login to get access to the downloads. When following the link from any record be sure to make a note of the page number. You will then have to download the full diary in pdf format and search for the respective page and hence entry.
Lance Corporal Wilfred John Lewis
Date of death: 13/10/1915 (aged 19)
Cemetery: CAMBRIN CHURCHYARD EXTENSION
Son of John and Elizabeth Lewis, of Deer Creek, Dicker, Montana, U.S.A. Native of Gosport, Hants., England.
Private Bert Lewis
Date of death: 25/01/1917
Cemetery: AMARA WAR CEMETERY
Son of Samuel and Elizabeth Lewis, of 3, Southampton St., Southampton.