I don't believe that the regulators are prevented from greatly expediting anything that they wish to. If, in fact, this is a rolling submission, and in fact, they have been reviewing parts of it for many months.
Of course, we don't know what they or any of the other regulators may already be holding. All we know is that in the UK, they approved the commercial production facility in Sawston many months ago. Elsewhere the commercial production is part of the overall approval process.
Gary