NATS is not the air safety authority of UK. They have long been investigated for safety by UK's Civil Aviation Authority.
If one main purpose of hiring those NATS expert was to investigate the new systems safety, then, I am not so sure they are the right expert in safety investigation. On the other hand, They definitely had longer/better experiences in dueling with government for long delayed projects.
Last edited by youknowwho; 5th Mar 2016 at 13:49.