- At the end of The Great War, the 2nd line and Reserve Battalions were disbanded. Most of the original Battalions were placed in suspended animation, and then reformed after a short interval, as part of their parent regular Regiment.
- On 1st October 1921 the Territorial Force was renamed the Territorial Army.
- In 1922, the 7th and 8th Battalions, The London Regiment were amalgamated as the 7th ; the 15th and 16th were amalgamated as the 16th .
- The only Battalion not re-raised as infantry was the 25th Cyclist Battalion which was amalgamated with 47th Divisional Signal Company to form 47th ( 2nd London) Divisional Signals, Royal Corps of Signals.
- The linkages with parent regular Regiments continued in most instances up to WW2 and beyond. Thus the only break in formal linkage with a parent regular Regiment for London infantry units was between 1908 and 1916.
- In 1922 The London 'Battalions' were re-titled as 'Regiments'. This was much more logical. As already mentioned, the Battalion title had been something of an anomaly since all these Battalions had doubled and trebled during The Great War.
- In 1922 The London Regiment stood as follows:
Royal Corps of Signals:
47th ( 2nd London) Divisional Signals, Royal Corps of Signals
The Queen's Royal Regiment (West Surrey):
22nd London Regiment (The Queen's)
24th London Regiment (The Queen's)
The Royal Fusiliers (City of London Regiment):
1st City of London Regiment (Royal Fusiliers) 2nd City of London Regiment (Royal Fusiliers) 3rd City of London Regiment (Royal Fusiliers) 4th City of London Regiment (Royal Fusiliers)
The East Surrey Regiment:
21st London Regiment (First Surrey Rifles)
23rd London Regiment
The Queen's Own Royal West Kent Regiment:
20th London Regiment (The Queen's Own)
The Middlesex Regiment (Duke of Cambridge's Own):
7th City of London Regiment (Post Office Rifles) 13th London Regiment (Princess Louise's Kensington Regiment) 19th London Regiment (St Pancras)
The King's Royal Rifle Corps:
6th City of London Regiment (City of London Rifles) 9th London Regiment (Queen Victoria's Rifles) 11th London Regiment (Finsbury Rifles) 12th London Regiment (The Rangers) 16th London Regiment (Queen's Westminster and Civil Service Rifles)
The Gordon Highlanders:
14th London Regiment (London Scottish)
The Royal Ulster Rifles:
18th London Regiment (London Irish Rifles)
The Rifle Brigade (Prince Consort's Own):
5th City of London Regiment (London Rifle Brigade) 10th London Regiment (Hackney) 17th London Regiment (Poplar and Stepney Rifles)
28th London Regiment (Artists Rifles)
- The 10th London Regiment was transferred to The Royal Berkshire Regiment (Princess Charlotte of Wales's) in 1929.
- The 28th London Regiment (Artists Rifles) became part of The Rifle Brigade (Prince Consort's Own) in 1929.
The Territorial Army London Regiment after The Great War