How long would that take Dan? Would it miss Christmas?
It really depends on how extensive the changes they want are. Without wishing to blow my own trumpet, as it were, I'm pretty... fast when it comes to writing and I'm even faster when it comes to rewriting, adjusting, chopping, changing, amending etc. something I've already written.
Some time ago, when it became clear that this vetting thing was unavoidable, I asked BAE Systems to highlight the 'problem' areas in the manuscript so that they could be worked through methodically, one by one, until a satisfactory version had been reached. They have, I'm told, been doing this. But not everyone works at quite the same pace as me.
Will it be out in time for Christmas? The pages haven't been designed yet - there's no point paying for that if it all has to be torn up or, worse, binned in its entirety. So once the issues, whatever they are, have been resolved, the pages have to be laid out and corrected (errors always arise during the design process - it's just inevitable) to get a full set of print-ready pdfs.
With those in hand, the printer has to be commissioned and they have to have the correct paper available in the correct quantity (not always a given these days). Then the book has to be printed, then it has to be shipped back to the Mortons warehouse, then it has to be unloaded, turned around and sent out to distributors (publishers do not, for example, supply Amazon directly. The books have to go to a middleman, who then sends them on to Amazon) or directly to customers.
If I'd been free to commence this process as soon as the book was fully written (end of August) there would have been no problem having it available before Christmas. Now... getting a copy in hand before Christmas would require a lot of traffic lights to turn green at just the right time. Not impossible, but not necessarily that likely either.