UK gov asked NYT to destroy Snowden material

The recent budget was labeled "“Access to the information in this document is restricted to US citizens with active SCI accesses for SPECIAL INTELLIGENCE andTALENT-KEYHOLE information.” Only a few pages were published. The Post chose to redact the rest,possibly out of concern that unredacted publication would be more reckless than useful.

We know that hackers from China had free reign over the New York Times network–conceivably they had access to information that wasn’t “fit to print”. Is it too much of a stretch to thing that the Guardian network contained information that was useful for the pursuit of journalism, but not necessarily appropriate for full disclosure? Could hostile intelligence agencies gain access to the complete files and thwart the Guardian’s attempts to redact, edit, and engage in responsible journalism?