Due to the rapid expansion of the Royal Artillery at the start of and just prior to the start of the war, a number of yeomanry regiments were converted to RA. Also, infantry TA regiments were converted. From 1941 to 1943 Medium Machine Gun units were converted to anti-tank regiments.
All of these appear in their own lists for ease of reference as well as being in the appropriate unit list.
|Yeomanry converted to RA|
|TA infantry converted to RA|
|MMG Battalions converted to anti-tank regiments RA|
|Royal Marine Artillery Regiments|
|Royal Malta Artillery Regiments|
|Hong Kong Singapore Regiments RA|
|West African Artillery|
|East African Artillery|