I'd have thought it unlikely NR would issue the revocation without consulting the ORR.
They probably will have, but the simple fact is NR are bound by the legislation and regulations governing the suspension and the basis of it. NR issued the suspension and said it would be removed if specific requirements were complied with. As it appears that these have complied with they have to lift the suspension, otherwise WCR could make a claim against NR for damages, malfeasance or whatever.
The ORR activity has nothing to do with the NR suspension in a legal sense, and if WCR have complied as stated, then NR must lift the suspension. It is for the ORR to take whatever steps it feels necessary under whatever powers it has, but this does not relate directly to NR's suspension.
Thus no doubt NR will have spoken with ORR, but the ORR process started after and separately to NR's, and any deviation from the appropriate processes will leave NR and ORR open to legal challenge. ORR will deal with their matters in their own good time.
I note NR have taken a very sensible approach and made WCR appoint named individuals to key safety positions, people with the experience and credibility to address the issues. And people who fully and properly understand the implications of being in that position.