The London Regiment was an infantry regiment in the British Army, part of the Territorial Force. The regiment saw service in the First World War and was disbanded in 1938, shortly before the Second World War, when most of its battalions were converted to other roles or transferred elsewhere, and reformed in 1993. The London Guards date their formation to that of this regiment in 1908.

The London Guards is a formation within the British Army comprising the reserve companies of the Grenadier, Coldstream, Scots and Irish Guards. On formation these companies drew their personnel from the London Regiment and it traces its history back to the formation of that regiment in 1908 when 26 separate Volunteer Force battalions were brought together. The London Guards is not a regiment, the companies wear the uniform, and follow the traditions, of their foot guards regiment.