From the Information comment re 2 inch mortars in the OOBs:
The British 2-inch Mortar was principally a pyrotechnic weapon, commonly utilizing smoke and flare shells and rarely being issued HE shells. The 2 inch Mortar is included to allow for the availability and use of smoke at the company level, and for those rare times HE was issued.
A couple of points on this:
Firstly I was under the very strong impression the 2 inch mortar was organic to the infantry platoon not the company.
Second, the Company was allocated mortars, from the mortar platoon, the 3 inch mortars, based on its operational needs and that allocation came from the Battalion Commander.
A reasonable TO&E for the British Infantry Battalion, June 1944 - Rifle Company is provided at:
http://www.bayonetstrength.150m.com/...le_company.htm
As for the Australian TO&E for the Infantry Platoon 1944:
A platoon has 1 x 2 inch Mortar with a crew of 3
Also this TO&E says the ammunition layout for the 2 inch Mortar is 12 HE and 18 Smoke. The direct implication is that HE was about as common as Smoke. Further in this particular Manual it indicates a smoke round will generate a smoke cloud normally lasting about 2 and half minutes.
Australian Reference: INFANTRY TRAINING part VIII FIELD CRAFT, BATTLE DRILL, SECTION AND PLATOON TACTICS, 1944.
In general I believe that the 2 inch mortar should be part of the infantry platoons as they come under that control not company.
This would mean a direct re structure of the current Platoon formation in the various OOBs.
The mortar can not become a weapon in a section weapon slot as that would nullify its functionality.
Also with respect to HW use in the 2 inch mortar prior to the battle of Milne Bay, 1942, Brigadier Fields, Commander 9 Brigade, placed an ammunition/stores indent in which there was a high proportion of 2 inch HE rounds for these mortars.
When I can re-find that list I can post it as reference if so needed. Its buried in a pile of reference papers and books some where in my office.
With respect to Australian troops many of the AMF infantry units, platoons and companies, in PNG initially were not issued with the 2 inch mortars. The AIF were. This lack of 2 inch mortars was evident in the early days of the Kokoda Track battles.
AMF Battalions were issued with the 3 inch mortars.