No information on file for this battalion.
| # | Last Name | First Name | Initials | Rank | Regiment | Unit | Date of Death |
|---|---|---|---|---|---|---|---|
| 1352 | Bayly | Harry Ayrton | H A | Second Lieutenant | Royal Fusiliers | 12th Bn. | 1917-06-14 |
| 1397 | Beauclerk | Nevill Alfred De Vere | N A D V | Lieutenant | Essex Regiment | 12th Bn. | 1915-06-17 |
| 1621 | Benton | William Manstead | W M | Captain | Manchester Regiment | 12th Bn. | 1916-08-17 |
| 1906 | Blake | William Grant | W G | Corporal | Argyll and Sutherland Highlanders | 12th Bn. | 1916-09-12 |
| 1979 | Bloom | Henry | H | Lieutenant | Yorkshire Regiment | 12th Bn. | 1917-02-14 |
| 2039 | Bolt | Leslie | L | Lance Corporal | Rifle Brigade | 12th Bn. | 1916-10-07 |
| 2595 | Briggs | Francis | F | Private | Australian Infantry, A.I.F. | 12th Bn. | 1915-04-25 |
| 2956 | Budden | Harold William | H W | Second Lieutenant | Lancashire Fusiliers | 12th Bn. | 1916-09-14 |
| 3386 | Carlton | Cornelius | C | Sergeant | Royal Scots | 12th Bn. | 1918-04-11 |
| 3403 | Carnegie | Theodore Arthur | T A | Lieutenant | King's Royal Rifle Corps | 12th Bn. | 1917-08-16 |
| 4336 | Compton | Roland | R | Private | Royal Fusiliers | 12th Bn. | 1917-01-09 |
| 6443 | Edmonds | John | J | Private | Gloucestershire Regiment | 12th Bn. | 1916-05-24 |
| 7084 | Ferris | William Small | W S | Second Lieutenant | Royal Irish Rifles | 12th Bn. | 1917-06-07 |
| 8010 | Gent | Percy Lionel | P L | Private | Australian Infantry, A.I.F. | 12th Bn. | 1915-05-02 |
| 8539 | Graham | Ernest William | E W | Second Lieutenant | Border Regiment | 12th Bn. | 1916-10-18 |
| 8851 | Groom | Ernest Cecil | E C | Private | Australian Infantry, A.I.F. | 12th Bn. | 1917-05-07 |
| 8894 | Guise | Reginald Edward | R E | Lieutenant | Gloucestershire Regiment | 12th Bn. | 1918-06-29 |
| 9248 | Harries | Frederick Ebenezer Melville | F E M | Second Lieutenant | King's Royal Rifle Corps | 12th Bn. | 1917-02-26 |
| 10010 | Hoare | Richard Lennard | R L | Captain | London Regiment (The Rangers) | 12th Bn. | 1916-07-01 |
| 10402 | Howitt | Adam Gordon | A G | Captain | East Surrey Regiment | 12th Bn. | 1917-08-05 |
| 13538 | Libby | Alfred Thomas | A T | Lieutenant | East Surrey Regiment | 12th Bn. | 1917-09-20 |
| 14606 | Major | Arthur | A | Lance Corporal | Australian Infantry, A.I.F. | 12th Bn. | 1915-04-25 |
| 15108 | Mardon | Frederick | F | Rifleman | King's Royal Rifle Corps | 12th Bn. | 1917-11-20 |
| 15856 | McCAUSLAND | David | D | Captain | Royal Irish Rifles | 12th Bn. | 1917-11-22 |
| 15887 | McCRACKEN | John | J | Lance Corporal | Royal Scots | 12th Bn. | 1918-04-25 |
| 16223 | McNAUGHT | Ernest Henry | E H | Second Lieutenant | Royal Fusiliers | 12th Bn. | 1916-07-18 |
| 16307 | Mears-Devenish | John Augustus | J A | Second Lieutenant | Royal Fusiliers | 12th Bn. | 1918-03-22 |
| 16435 | Messenger | Wilfrid Chaundler | W C | Captain | Rifle Brigade | 12th Bn. | 1917-09-16 |
| 16667 | Miller | Montague John | M J | Rifleman | King's Royal Rifle Corps | 12th Bn. | 1917-02-13 |
| 17422 | Morgan | Alfred Ernest | A E | Second Lieutenant | Middlesex Regiment | 12th Bn. | 1916-10-29 |
| 17466 | Morland | Leonard Mark | L M | Lieutenant | West Yorkshire Regiment (Prince of Wales's Own) | 12th Bn. | 1916-05-03 |
| 17488 | Morris | Charles | C | Private | Highland Light Infantry | 12th Bn. | 1916-08-13 |
| 18045 | Munro | Baillie Chisholm | B C | Second Lieutenant | King's Royal Rifle Corps | 12th Bn. | 1917-07-10 |
| 18056 | Munro | Murdo Simon | M S | Second Lieutenant | Rifle Brigade | 12th Bn. | 1917-04-26 |
| 19452 | Ormsby | Horatio Nelson | H N | Lieutenant | Cameronians (Scottish Rifles) | 12th Bn. | 1915-06-02 |
| 21404 | Rice | Henry Vincent | H V | Private | East Surrey Regiment | 12th Bn. | 1917-05-06 |
| 21726 | Roe | Frank Edward Mervyn | F E M | Captain | Rifle Brigade | 12th Bn. | 1916-06-07 |
| 24456 | Sugarman | Samuel Solomon | S S | Private | East Yorkshire Regiment | 12th Bn. | 1916-08-15 |
| 24704 | Talbot-Bowe | Edward | E | Captain | Royal Berkshire Regiment | 12th Bn. | 1917-11-01 |
| 25247 | Tiffany | Harry Waddington | H W | Captain | Royal Fusiliers | 12th Bn. | 1916-11-15 |
| 25662 | Tuttiett | Laurence William | L W | Captain | Royal Sussex Regiment | 12th Bn. | 1916-09-03 |
| 28319 | Wiley | Evelyn Otway Scarlett | E O S | Lieutenant | Durham Light Infantry | 12th Bn. | 1918-11-07 |