Didn't spot anything sinister, and looks like your links gone section 8 lol.
At The Mall on the weekend I chatted with group of guys who mentioned/recommend doing the 'room-clearing' training with these guys (pretty sure was same, def remember 'airborne' mentioned) before they came to The Mall. They'd all done several of the courses and highly recommended it as very enjoyable and brilliant for improving ones airsoft skills.
They were a bit young and therefor perhaps a little bit too convinced a couple afternoons had turned them into Andy McNab. Didn't help them though, two actually fell over each other scrambling for cover in an empty room with none available after i shot their mate 'guarding' the stairs and quickly pushed forward. Seemed like that all occurred the wrong way round and I'd used the 'pro' tactic lol
Do you know if one the trainers is actually serving SAS, or if this was a bit of youthful embellishment from these guys? (my suspicion the later, hopefully one them being dippy and taking a sarcy comment seriously on the day rather than raw bullshit lol)
All a bit too serious/funny for me, but if it can make you feel like more a bad-ass and have more fun playing like the guys i spoke to then you've got your money's worth even if you don't get transformed into the airsoft equiv of Universal Soldier after one session