Almost there!

Received the two boxes of Brits in the mail today, and spent a piece of the evening sorting out the remaining two platoons. I ended up re-organizing the first platoon a bit as well, to get the figures sorted to my satisfaction, but now I have three identical platoons consisting of:

HQ
===========
1 officer w/Sten (Subaltern, Platoon Commander)
1 kneeling Sten (Sergeant)
1 2" mortar team
2 riflemen (runners)

1st Squad
===========
1 kneeling Sten (Corporal, Squad Leader)

Bren Section
-------------
1 throwing grenade, carrying rifle (Lance Corporal)
1 Bren
1 rifleman

Rifle Section
----------------
6 riflemen

2nd Squad
============
1 kneeling Sten (Corporal, Squad Leader)

Bren Section
-------------
1 throwing grenade, carrying rifle (Lance Corporal)
1 Bren
1 rifleman

Rifle Section
----------------
6 riflemen

3rd Squad
===============
1 kneeling Sten (Corporal, Squad Leader)

Bren Section
-------------
1 throwing grenade, carrying rifle (Lance Corporal)
1 Bren
1 rifleman

Rifle Section
----------------
4 riflemen
1 PIAT team

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On the down side, I had to strip my carrier platoon to fill out the third platoon, and I still have to fill out a proper Company HQ. But I'm less concerned about the carrier platoon than having a full infantry company, so it's all good.