Yes, I'd heard that too. But I'm always a sceptical about this business of paying for military involvement. The guys doing the work are already employed and paid for, so barring some overheads it's hard to see the justification for the costs. If the MoD deliberately employed extra people for MACP, then there would be a case, but it's just a case of diverting them from primary tasks to carry out a different, stated, military role. Yes, other things don't get done straight away, but we're not talking thousands of man-hours here.
I wonder what rate the MoD charge. I'm guessing it's not just transportation, food and accommodation.