This thread is starting to turn into a childish rant from some quarters.
Lets not keep arguing with 411A. It is obvious that his airline is the best at what it does (despite having aged, maintenance hungry and fuel inefficient aircraft in tiny numbers), and so may be in great demand in the future for work that the RAF Tristars are currently doing.
Although it is obvious to almost everyone here that his airline CANNOT do the role now, and would be uninsurable for the purpose, that is not to say that if:
His company get an 'end user' certificate to buy DAS equipment; they they put their aircraft in for deep maintenance to have DAS equipment (of suitable quality, and with total loss of revenue during this period) to all their aircraft; they employ extra staff and engineers to be able to service and overhaul the DAS gear; they train their crews on how to operate the gear; they obtain full insurance for this new 'in theatre' type role; their crew can also get suitable insurance; they get MOD/DOD permission for their crews to be 'eyes on' with secret MOD equipment (a hurdle for many carriers).
Then they will be on a level playing field, and the massive extra costs involved in this move will no doubt make them more expensive than the RAF, due to their tiny size.
Just my two penneth. I am of course happy to be corrected that 411A's friends are all DAS trained and experienced, and suitably insured for combat/in theatre type operations rather than airline operations.