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.

In April 2022, the London Regiment was re-designated 1st Battalion London Guards and ceased to be a regiment in its own right. Its companies transitioned to become reserve companies of the Grenadier, Coldstream, Scots and Irish Guards. The London Guards is not a regiment. Reservists, being members of a foot guards regiment, wear the uniform, and follow the traditions, of their foot guards regiment.

The administrative Headquarters of the London Guards is at St John’s Hill with the reserve foot guards companies at:

• Ypres Company, Grenadier Guards (formerly G (Guards) Company), in Kingston upon Thames
• No 17 Company, Coldstream Guards (formerly F (Rifles) Company), in Hammersmith
• G (Messines) Company, Scots Guards (formerly A (London Scottish) Company), in Clapham Junction
• No 15 (Loos) Company, Irish Guards (formerly HQ (London Irish Rifles) Company), in Camberwell.

While most officers and soldiers wear the uniform of their regiments, three individuals; the Colonel, the Lieutenant Colonel and the Commanding Officer, wear a London Guards uniform, exhibiting the London Guards stars on the collar, and the buttons of all five regiments of foot guards on the front of the tunic and the cuffs.

On 9 July 2023 the 1st Battalion London Guards were presented with new Colours by their Regimental Colonel HRH Prince Edward, the Duke of Edinburgh in a ceremony at Buckingham Palace.