Excuse my use of the term "squad" - it's probably not correct, but I am referring to a group of 10 men or so. I know traditionally, it would have had mostly rifles, a couple of SMGs and an LMG section.
Quite how this would translate into airsoft is another question. From experience, I can tell you that the MP40 is a very good airsoft weapon indeed. The so-called "second batch" weapons have an improved range which would give a bolt action rifle a run for it's money - certainly if we armed ourselves "traditionally", we would find ourselves outgunned in most circumstances.
But, a Bren section would be most cool! What donor gun is used in the Bren, and what's the range like?
You've got nothing to ein, zwei, drei, vier
A standard 10 man British army section consists of:
Corporal armed with an SMG (for airborne that means a Sten MkII or Sten MkV)
Lance Corporal armed with a rifle (more likely to be a sten in an airborne unit)
Bren Gun No1 armed with a Bren gun
Bren Gun No2 armed with a rifle (again could be a sten in an airborne unit)
6x Infantry armed with rifles (stens are possible in an airborne unit)
So its possible to have a lot of fully auto weapons available to us!
In wwii as now its called a 'section'
(squad refers to generic body of men for dril purposes)
A rifle section (infantry battalion 1944) on paper composed thus:
Cpl with sten
6 x rifle men with no4
l/cpl with no4
Bren gunner with bren
Bren gun no2 with no4
An airlanding battalion had a much higher proportion of stens, up to every third man if needed.
Casualties upon landing could make section under strength
In battle an airborne section could consist of between 4 and 10 men with every conceivable mix of the above + mp40s, mp44, k98s mg34 and mg42
Whatever they could lay their hands on and had ammo for basically.
"I think we are in rats' alley - Where the dead men lost their bones."
As Yith and Gadge say, but i can quote the SAA instruction Pamphlet No 4(I think) the Bren LMG 1937 (if you let me know, i can email all of them to ppl as PDF files or send them in the post as hard copy for cost) says its
Section ic - Cpl with sten and 250 rds 9mm ball
Section 2ic(bren team commander) - l/cpl sten and 250 rds 9mm ball
Rifleman X4 with 50 Rds Small Arms Ammunition + 2 full Bren LMG Mags
Grenadier (X2)- Rifle, 50 rds, 3X Mills Grenades, 2 X Smoke/WP Grenades
Bren Gunner, Bren and 4 Full mags
Bren No 2, Rifle and 8 Full bren mags
This is a standard infantry section dated 1937, a full strength section in action would carry more of ammo.
the sections were habitually fiddled with at various times and for varying reasons-eg a motor rifle unit would have a smaller section size as the vehicle carrying capacity was lower (etc), also some sections later in war could have 2 Brens! Hows that for firepower? mmm
Its a bit daft, the 6 rifle men had to fill the mags, with 2 brens, they wouldnt have had any chance to fill em at all.
the lads wouldn't be filling mags in the heat of action-they'd be preloaded in the 90% of time that veterans described as those boring moments between getting sh** scared... it was a field extemporisation. Also read tales where although platoon is 30 strong it was often found that ground was only taken by a small cadre of determined men -usually as few as 7 or 8!!!! Rest would be under cover/doing something else....
Sorry mate, that was a joke.
hey I took it as such 
just thought it would be interesting to continue the patter about how the regs said one thing and reality often dictated something else...
Thought as much, but at that time of the night, I didnt know my own name. lol.
yeah... I get loads of unnecessary stuff in my Zafira as well... 
Its different when you have to carry the shit around with you... 