SUSAT does indeed have emergancy iron sights. Good luck hitting anything over 150m+ with the EBS (emergancy battle sight) though

The fore tip nearly takes up the whole rear aperture's relief, like aiming with a fat person's thumb. Also, we do not carry an alternative sighting system in the field (at soldier level). We do not have an option of swapping out a SUSAT for iron sights. driver-ch-driver: The images you saw were either of CWS (1st gen NVS) or others that were theatre specific to NI.
SUSAT is still in use, as are iron sights. Front line troops are now kitted out with ACOG, along with the RIS handgrip and bipod).
The logistical chain has kicked in, so it's common sense to realise that with ACOG now being first choice, SUSAT has moved to second and iron sights, third. When they trailed ACOG as a UOR, loads of SUSATs were held in theatre for a year in case of mass malfunction/breakage/decision to revert. Now they've pretty much been backloaded, and ACOG's here to stay, at the minute most previlant in-theatre.
Units that were traditionally issued with iron sights (non 'teeth arms' units) are now getting SUSATs, and Iron sight usage is indeed declining. There are however a number of reasons for keeping iron sights in the logistical system.
1) For recruits, the use of iron sights is very important for the basic marksmanship training, before moving on to using/adjusting a SUSAT sighting system. The ACOG is only in-theatre in any great number at the minute, so it is not factored into basic training. This can easily be cover pre-depolyment or when the soldier reports to their parent unit after basic.
2) Jungle warfare training/deployments mean iron sights are very handy. Typical contacts in a jungle environment max at 50m, usually 25-30m. A SUSAT is zeroed to 300m be default, and the minimum setting is 100m, and the units add unesessary weight to the complete weapon system. Lighter weapon means more maneuverability and therefore a quicker reaction time to laying down fire if needed. There's also the obvious regarding the lenses misting up. These 2 facts alone make me laugh when I see a holywood film showing *insert country title* SF unit patrolling the jungle. There's always the token sniper with his long out, with a big scope. Pointless.
3) Iron sights weigh less, and are less of a logistical burden. However, this is not a factor that affects wartime deployment (a la PR).
For CQB contacts, it could be argued that jungle combat reasoning (barr misting) is more beneficial. Quicker draw time and so on. However, iron sight/SUSAT or ACOG not withstanding, you do not use any sights if you're that close. You have the weapon as an extension of your body/arm, and where you look or point your leading body element is where the rounds go. Not even any point using a SUSAT or ironsights in a hostage situation....at 100m your SUSAT's Point Of Aim (POA) will not match your Point Of Impact (POI). It's zeroed to 300m and due to it being situated higher than the barrel, your rounds will land 2-3 inches below your POA. Meaning you just popped the hostage's head. At a range of 10m or less, heh....better going for your drop holster.
That's just some info for you all

We are looking into overhauling the L85A2s, however it's not within 0.9's scope.