The IAA fellow who spent time at NATS must have seen this in practice, or been briefed on it. Unless he walked around with blinkers on, or never actually set foot on a busy NATS unit.
The IAA fellow who spent time at NATS is the chief exec of the IAA.....regardless of what he saw the accountant in him would still see ATCOS as these expensive luxuries that should only be recruited as a last resort...bottom line is all he sees!!!