London Units in the period between The Great War and Second World War (WW2)
- In 1935, two London Regiments – the 4th (Royal Fusiliers) and the 11th (Finsbury Rifles) – became Anti-Aircraft Brigades of the Royal Artillery. At the same time, five London Regiments – the 6th (City of London Rifles), the 7th (Post Office Rifles), the 19th (St Pancras), the 20th (The Queen's Own) and the 21st (First Surrey Rifles) – were transferred to the Royal Engineers as Anti-Aircraft Battalions, equipped with searchlights.
- In 1937, the remaining 16 London Regiments were re-named as Battalions of their parent Regiments. Thus, after 29 years, the name of The London Regiment, as founded in 1908, disappeared from the Army List. It re-appeared briefly in 1956 with the 23rd London Regiment which changed its name in 1961. The newly reformed London Regiment did not re-appear until 1993.
- Two of the re-named Battalions did not remain as infantry for very long, for in 1938 the 3rd , now named 10th Battalion, The Royal Fusiliers, became a Searchlight Regiment, though it retained its Fusilier title; and the 23rd , now named 7th Battalion, The East Surrey Regiment, became 42nd Battalion, Royal Tank Corps.
- In 1939, 42nd Royal Tank Regiment, the Signals unit, and all the infantry Battalions except The Artists Rifles, raised 2nd line units. The old 11th London Regiment raised a second anti-aircraft Regiment; and the London Scottish raised an anti-aircraft Regiment in addition to its two infantry Battalions.
- On the outbreak of WW2 the successors of The London Regiment stood as follows:
1908 London Regiment Battalion Royal Armoured Corps:2342nd Royal Tank Regiment2348th Royal Tank RegimentRoyal Regiment of Artillery:460th (City of London) Anti-Aircraft Regiment111st (Finsbury Rifles) Anti-Aircraft Regiment1112th (Finsbury Rifles) Light Anti-Aircraft RegimentCorps of Royal Engineers:6, 31st (City of London Rifles) Anti-Aircraft Battalion7, 832nd ( 7th City of London) Anti-Aircraft Battalion1933rd (St Pancras) Anti-Aircraft Battalion2034th (The Queen's Own Royal West Kent) Anti-Aircraft Battalion2135th (First Surrey Rifles) Anti-Aircraft BattalionRoyal Corps of Signals:252nd Corps Signals255th Corps SignalsThe Queen's Royal Regiment (West Surrey):221st / 6th (Bermondsey) Battalion222nd / 6th (Bermondsey) Battalion241st / 7th (Southwark) Battalion242nd / 7th (Southwark) BattalionThe Royal Fusiliers (City of London Regiment):18th ( 1st City of London) Battalion29th ( 2nd City of London) Battalion310th ( 3rd City of London) Battalion ( 69th Searchlight Regiment)111th Battalion212th BattalionThe Royal Berkshire Regiment (Princess Charlotte of Wales's):105th (Hackney) Battalion107th (Stoke Newington) BattalionThe Middlesex Regiment (Duke of Cambridge's Own):131st Battalion, Princess Louise's Kensington Regiment132nd Battalion, Princess Louise's Kensington RegimentThe King's Royal Rifle Corps:91st Battalion Queen Victoria's Rifles92nd Battalion Queen Victoria's Rifles121st Battalion The Rangers122nd Battalion The Rangers15, 161st Battalion The Queen's Westminsters15, 162nd Battalion The Queen's WestminstersThe Gordon Highlanders:141st Battalion The London Scottish142nd Battalion The London Scottish143rd Battalion The London Scottish (97th Anti-Aircraft Regiment)
The Royal Ulster Rifles:181st Battalion London Irish Rifles182nd Battalion London Irish RiflesThe Rifle Brigade (Prince Consort's Own):51st Battalion London Rifle Brigade52nd Battalion London Rifle Brigade171st Battalion Tower Hamlets Rifles172nd Battalion Tower Hamlets Rifles28The Artists Rifles
- In 1939 The Artists Rifles became 163 Officer Cadet Training Unit.
- In 1940, the Tower Hamlets Rifles raised a 3rd Battalion which, in 1941, became 5th Battalion, The Reconnaissance Corps.
- In 1941, the London Battalions of The King's Royal Rifle Corps and The Rifle Brigade became numbered Battalions of their parent regular Regiment and stood as follows:
1908 London Regiment BattalionThe King's Royal Rifle Corps:91st Battalion Queen Victoria's Rifles became 7th Battalion92nd Battalion Queen Victoria's Rifles became 8th Battalion121st Battalion The Rangers became 9th Battalion122nd Battalion The Rangers became 10th Battalion15, 161st Battalion The Queen's Westminsters became 11th Battalion15, 162nd Battalion The Queen's Westminsters became 12th BattalionThe Rifle Brigade (Prince Consort's Own):51st Battalion London Rifle Brigade became 7th Battalion52nd Battalion London Rifle Brigade became 8th Battalion171st Battalion Tower Hamlets Rifles became 9th Battalion172nd Battalion Tower Hamlets Rifles became 10th Battalion