3rd (City of London) Battalion, London Regiment

20th Middlesex Rifle Volunteer Corps
3rd City of London Regiment
69th (3rd City of London) S/L Regiment
625th Light Anti-Aircraft Regiment
20th Middlesex Rifle Volunteer Corps; 3rd City of London Regiment; 69th (3rd City of London) S/L Regiment; 625th Light Anti-Aircraft Regiment
Active	13 December 1859 – 10 March 1955
Country	United Kingdom
Branch	Territorial Army
Role	Infantry; Air Defence
Size	1 Battalion; 4 Battalions (WWI); 3 Batteries (WWII)
Part of	Royal Fusiliers; London Regiment
Garrison/HQ	21 Edward Street, Hampstead Road, St Pancras (3rd Londons); Harrow Road, Paddington (69th S/L)
Nickname	Railway Rifles
Engagements	Second Boer War; WWI:; 1st Bn: 2nd Ypres; Gommecourt; Ginchy; Flers–Courcelette; Morval; Le Transloy; Arras; Langemarck; Cambrai; 2nd Bn: Gallipoli; Bullecourt; Menin Road; Passchendaele; St Quentin; Villers-Bretonneux; Chipilly; WWII: Battle of Britain; The Blitz; Operation Diver;

The 3rd (City of London) Battalion, London Regiment (Royal Fusiliers) was a volunteer unit of the British Army under various titles from 1860 to 1961. Originally raised from railwaymen, the battalion sent a detachment to the Second Boer War and several battalions fought in World War I. Shortly before World War II, it became a searchlight unit and defended the UK during the Blitz, remaining in the air defence role in the postwar Territorial Army.