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.
Second Lieutenant George Smith
Queen's Own (Royal West Kent Regiment)
Date of death: 15/09/1916 (aged 25)
Cemetery: BULLS ROAD CEMETERY, FLERS
Son of Charles and Fanny Smith, of 62, Lime Grove, New Malden, Surrey.
Private William John Smith
East Surrey Regiment
Date of death: 24/03/1918 (aged 37)
Cemetery: MERTON (ST. MARY) CHURCHYARD
Son of William and Sarah Smith; husband of Emily Florence Elizabeth Smith, of 306, Kingston Rd., Raynes Park, London. Born in Fifeshire.