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.
Date of death: 23/04/1918 (aged 18)
Cemetery: ETAPLES MILITARY CEMETERY
Son of John and Mary Williams, of Eglwyswrw, Pembrokeshire.
Date of death: 19/07/1918
Cemetery: BORRE BRITISH CEMETERY
See COLLINS, the true family name.