Flip, yes, if it occurred, I think it would have worked something like this:
NW applies a while go for early access (as they told us in their presentations), PEI then starts reviewing non-Phase III data. Meanwhile, NW, FDA, and PEI meet to determine how PEI could get access to the Phase III data. Possible outcome could be 'when interim event milestones hit, PEI can have access just as DMC does, while NW remains blinded'. This would also explain the announcement timing coming after the 1st interim in approx. the same timeframe as we expect the efficacy interim outcome.
As well, I have dealt with German companies, press, and people many many times over the years in business, and if I can hazard a generalization across all that experience, I would characterize the attitude seen as relentlessly pragmatic and data driven. I simply think the PEI would have insisted on access to that data to make the best decision possible. All the above JMHO of course.