Bemusing.
According to
Vulcan to the sky news
This report does not need to contain the results of the inspections, only the reasons for them, how they would be carried out or alternatively mitigated.
ie the CAA are not yet satisfied that the MA explanation of why the checks can be got round before a Permit To Fly can be issued.
There is no question that XH558 is in any way structurally unsafe.
Since, as yet, the CAA is not satisfied with MA's explanation, there clearly is a question, at least for now, in the CAA's mind.