RE Library and Archive World War One Unit War Diaries Key RE Royal Engineers TA Territorial Army R Reports E Extracts A Appendix SIG Signal S Summary E&M Electrical & Mechanical CL Casualty List MD Missing Documents MC Miscellaneuos Documents EinC Engineer in Chief O Orders NR Nominal Roll D Diagrams M Maps L of C Lines of Communication BEF British Expeditionary Force EEF Egyptian Expeditionary Force I Instructions File No. Unit Dates covered by diary Notes 1 GHQ Signal Company Royal 01 Jul 1916 to 31 May 1918 and MD Engineers British Expeditionary Force Sep 1918 2 GHQ Signal Company Archangel 19 Oct 1918 to 28 Apr 1919 and 01 Aug 1919 to 20 Sep 1919 GHQ Signal Company Egyptian Mar 1915 to 31 May 1919 Expeditionary Force GHQ Signal Company East African 04 Apr 1916 to 01 Sep 1916 S GHQ Signal Company France 06 Aug 1914 to 16 Sep 1916 S GHQ Signal Company Italy 02 Dec 1917 to 31 Dec 1917 and 01 May 1918 to 28 Feb 1919 3 Army Signal Company 01 Jul 1917 to 28 Feb 1919 British Rhine Army Signal Company 01 Jan 1919 to 29 May 1919 Northern Army Cyclist signal Company 14 Oct 1916 to ? S Salonika Army Signal Company 21 Mar 1915 to 19 Oct 1916 S 4 1st Army Signal Company 14 Oct 1914 to 28 Feb 1919 2nd Army Signal Company 01 Jan 1915 to Dec 1915 and May 1916 to Jul 1916 and Aug 1916 to Oct 1916 and 21 Mar 1917 to 28 Dec 1918 and 01Jun 1919 to 30 Jun 1919 3rd Army signal Company 19 Jul 1915 to 19 Jul 1916 S 5th Army Signal company Jan 1916 to 28 May 1917 Reserve Army Signal Company 01 Aug 1918 to 31 Dec 1918 5 4th Army Signal Company 04 Apr 1915 to 26 Jan 1916 and D 24 Jan 1916 to 31 Dec 1917 and 01 Jan 1918 to 05 May 1919 6 4th Army Signal Company D only 7 A.D. Signals 4th Army Apr 1917 to Jul 1917 and Dec D only 1917 8 DD Signals 3rd Army 15 Apr 1915 to 19 Apr 1915 and 10 Jul 1915 to 30 Apr 1916 DD Signals 5th Army 19 Jun 1916 to 31 Jul 1918 M and D 9 A.D Signals 1st Corps 18 Dec 1916 to 23 Oct 1918 A.D.Signals 8 Corps 01 Jul 1916 to 29 Jun 1918 8 Corps Signal Company 04 Jul 1915 to 31 Jan 1916 and 01 Jul 1916 to 28 feb 1917 and Jun and Jul 1917 and Oct 1917 to Dec 1917 and Mar 1918 and May 1918 10 "B" Corps Signal Company 2 Corps Feb 1916 to Feb 1919 "C" Corps signal Company 3 Corps 04 Aug 1914 to 29 Mar 1915 and Oct 1917 and Jan 1918 and Mar 1918 to Dec 1918 and Jan 1919 to Mar 1919 "D" Corps Signal Company 4 Corps 05 Oct 1914 to 30 Oct 1914 and 01 Feb 1916 to 31 Jul 1917 "E" Corps Signal Company 5 Corps 11 Aug 1915 to 31 May 1919 "F" Corps Signal Company 6 Corps 08 Mar 1915 to 30 Jun 1917 "G" Corps Signal Company 7 Corps 29 Jan 1915 to 29 Feb 1916 "H" Corps Signal Company 8 Corps 04 Oct 1915 to 29 Jul 1916 S "J" Corps signal Company 9 Corps Dec 1914 to 14 Aug 1916 S "K" Corps Signal Company 10 Corps Feb 1915 to 18 Aug 1916 and 01 Dec 1916 to 31 Mar 1917 11 "L" Corps Signal Company 11 Corps Feb 1915 to 28 Sep 1918 "M" Corps Signal Company 12 Corps 05 Apr 1914 to 17 Jun 1919 "N" Corps signal Company 13 Corps 05 Aug 1915 to 31 Jul 1916 and 01 Oct 1916 to 05 Aug 1919 12 "O" Corps Signal Company 14 Corps 24 Feb 1916 to 26 Aug 1916 and 01 May 1917 to 31 Jan 1919 "P" Corps Signal Company 15 Corps 01 Feb 1916 to 01 Mar 1916 "Q" Corps Signal Company 16 Corps Oct 1915 to 29 Mar 1917 S "R" Corps Signal Company 17 Corps 22 Oct 1915 to 14 Jan 1916 and 01 May 1916 to 14 Jul 1919 "S" Corps Signal company 18 Corps 25 Apr 1916 to 31 Oct 1918 "T" Corps Signal Company 19 Corps 10 Jul 1916 to 12 Jun 1917 "U" Corps Signal Company 21 Corps 02 Jan 1916 to 04 Jan 1918 and S 03 Jan 1918 to 17 May 1919 "V" Corps Signal Company 20 Corps 01 Aug 1917 to 08 Aug 1917 and 01 Oct 1917 to 31 Jan 1919 "W" Corps Signal Company Suez Apr 1915 to 20 Mar 1917 S Corps "X" Corps Signal Company Oct 1915 to 20 Mar 1917 S 13 "Y" Corps Signal Company 28 Jan 1915 to 30 Nov 1916 AD Signals 2nd Anzac 22 Corps 01 Jan 1917 to 31 Dec 1918 1 Anzac Signal Company 22 Nov 1915 to 20 Sep 1916 S 14 IX Corps Signal 14 Jun 1916 to 31 Aug 1916 XIV Corps "J" Army corps Signal 01 Sep 1916 to 30 Apr 1918 Company Canadian Corps Signal Company 14 May 1915 to 14 Sep 1915 S Cavalry Corps Signal Squadron 25 Jun 1916 to 31 Dec 1916 and 01 Jun 1917 to 31 Dec 1917 and 01 Jan 1918 to 31 dec 1918 and 01 Jan 1919 to 05 Jun 1919 2/3 Indian Army Corps signal 26 May 1916 to 31 May 1916 Company 15 1st Divisional Signal Company 03 Feb 1915 to 22 Aug 1919 2nd Divisional Signal Company 07 May 1915 to 30 Jun 1918 and 01 Jan 1919 to 31 Aug 1919 ( Light Division Signal Company ) 01 Apr 1919 to 31 Aug 1919 16 3rd Divisional Signal Company 25 Apr 1916 to 25 May 1919 4th Divisional Signal Company 01 Feb 1915 to 31 Nov 1917 and 01 Mar 1918 to 28 Feb 1919 17 5th Divisional Signal Company 05 Aug 1914 to 09 May 1919 18 6th Divisional Signal Company 01 Oct 1915 to 31 May 1916 and 01 Sep 1916 to 31 May 1919 and 01 Jul 1919 to 15 Sep 1919 7th Divisional signal Company 04 Oct 1914 to 31 Dec 1918 and 31 Jan 1919 to 28 Feb 1919 8th Divisional Signal Company 18 Sep 1914 to 29 Feb 1916 9th Divisional Signal Company 27 Aug 1914 to 09 May 1915 and S 03 Mar 1916 to 31 Mar 1916 and 01 Nov 1916 to 28 feb 1918 10th Divisional Signal Company 01 Oct 1914 to 31 Jan 1916 and S 01 May 1917 to 28 Feb 1919 and 01 Aug 1919 to 31 Oct 1919 and 01 Mar 1920 to 31 Mar 1920 19 11th Divisional Signal Company 30 Aug 1914 to 31 Aug 1916 and 01 Oct 1916 to 31 Oct 1916 and 01 Dec 1916 to 31 Jan 1917 and 01 May 1917 to 07 Jul 1919 12th Divisional Signal Company 24 Aug 1914 to 28 May 1915 and 01 Nov 1915 to 31 Jan 1916 13th Divisional Signal Company 26 Sep 1914 to 30 Apr 1917 and 01 Jun 1917 to 24 Mar 1919 14th Divisional Signal Company 29 Aug 1914 to 01 Mar 1917 and 01 May 1917 to 28 Nov 1918 15th Divisional Signal Company 26 Sep 1914 to 31 Mar 1919 20 16th Divisional Signal Company 11 Aug 1915 to 31 May 1919 17th Divisional Signal Company 09 Oct 1914 to Aug 1917 S 18th Divisional signal Company 20 Oct 1914 to 13 Nov 1918 19th Divisional Signal Company 16 Oct 1914 to 29 Dec 1915 20th Divisional Signal Company 14 Oct 1914 to 27 Feb 1917 and 31 May 1917 to 30 Jan 1919 21 21st Divisional Signal Company 06 Oct 1914 to 30 Jan 1919 and 01 Mar 1919 to 22 Jun 1919 22nd Divisional Signal Company 22 Oct 1914 to 05 Feb 1916 and 27 Jul 1916 to 24 Oct 1916 and 01 Apr 1917 to 31 Dec 1918 23rd Divisional Signal Company 24 Oct 1914 to 29 Mar 1919 R and Returns 24th Divisional Signal Company Oct 1914 to 31 Dec 1916 22 25th Divisional Signal Company 28 Oct 1914 to 31 Aug 1916 and 01 Mar 1918 to 17 Jun 1919 26th Divisional Signal Company Oct 1914 to 11 May 1919 27th Divisional ( Wessex ) Signal Pre - War S Company 28th Divisional Signal Company 05 Aug 1914 to 30 Nov 1919 23 29th Divisional ( 1st London ) Signal Jan 1915 to Nov 1917 S Company 30th Divisional Signal Company ( was 01 Mar 1915 to 31 May 1919 37th Signal Company until 01 May 1915 ) 31st Divisional Signal Company Apr 1915 to 04 Oct 1917 and 04 S Jan 1919 to 31 Jan 1919 32nd Divisional Signal Company ( was 20 Jun 1915 to 27 Oct 1919 41st Signal Company until 15 Sep 1915 ) 24 33rd Divisional Signal Company 20 May 1915 to 31 Oct 1917 and 01 Dec 1917 to 31 Dec 1918 25 34th Divisional Signal Company ( was 05 Dec 1915 to 31 Jul 1919 38th Signal Company until 10 May 1916 ) ( 34th Signal Company disbanded 14 May 1915 ) 35th Divisional Signal Company ( was Feb 1915 to 28 Apr 1916 and 05 39th Signal Company until 10 May Jun 1916 to 24 Jun 1916 and 01 1916 ) ( 35th Signal Company Nov 1916 to 03 May 1919 disbanded 12 May 1915 ) 36th Divisional Signal Company 22 Sep 1914 to 31 Jul 1917 and 01 Sep 1917 to 30 Nov 1918 37th Divisional Signal Company ( was 13 Nov 1914 to 31 Mar 1916 and 40th Signal Company until 05 Jun 01 May 1916 to 31 Mar 1919 1915 ) ( Previously 31st Signal Company until 27 May 1915 ) 38th Divisional Signal Company ( was 01 Dec 1914 to 30 Dec 1915 and 43rd Signal Company until 29 Apr 03 Dec 1916 to 30 Dec 1917 and 1915 ) 01 Feb 1918 to 31 May 1919 26 39th Divisional Signal Company ( was Mar 1915 to 26 Oct 1916 33rd Signal Company until 24 Jun 1915 ) ( Previously 40th Signal Company until 10 May 1915 ) 40th Divisional Signal Company ( was ? to 21 Aug 1915 and 01 Jun S 37th Signal Company until 05 Jun 1916 to 31 Mar 1919 1915 ) ( Previously 30th Signal Company until 07 Apr 1915 disbanded 21 Aug 1915 ) 41st Divisional Signal Company ( was 20 Mar 1915 to 31 Dec 1916 and 32nd Signal Company until 15 Sep 01 Apr 1918 to 30 Sep 1918 and 1915 disbanded 15 Aug 1915 ) 10 Apr 1919 to 31 May 1919 42nd Divisional ( East Lancashire ) 1913 to May 1916 and 01 Oct Signal Company 1916 to 30 Sep 1918 46th Divisional Signal Company 1908 to 30 Apr 1919 and 01 Jun 1919 to 30 Jun 1919 47th Divisional Signal Company Mar May Jul Aug 1915 48th Divisional Signal Company Pre - War to 31 Aug 1918 27 49th Divisional Signal Company Jan 1913 to 17 Jun 1919 50th Divisional Signal Company 02 Dec 1915 to 17 Apr 1916 and 01 Jul 1916 to 31 Jul 1918 and 01 Sep 1918 to 31 Dec 1918 and 01 Feb 1919 to 30 Apr 1919 51st Divisional Signal Company 01 May 1915 to 30 Sep 1918 52nd Divisional Signal Company Pre - War to 31 Oct 1915 and 01 Dec 1916 to 30 Apr 1919 28 53rd Divisional Signal Company Pre - War to Sep 1916 and 01 S Jun 1918 to 30 Nov 1919 54th Divisional Signal Company 09 Jul 1915 to 31 May 1916 and 01 Jul 1916 to 01 Oct 1919 55th Divisional ( West Lancashire ) Pre - War to 16 Sep 1916 S Signal Company 56th Divisional Signal Company 26 Sep 1914 to 31 May 1919 29 57th Divisional Signal Company 04 Sep 1914 to 30 Apr 1919 58th Divisional signal Company 24 Sep 1914 to 30 Dec 1917 59th Divisional Signal Company 01 Jan 1915 to 30 Jun 1916 and 19