[PaulB]

Thanks for the feedback.
This is what I have done:

Started campaign and made the very first mission where you just head north of the base and patrol there. Can't remember the name of the base, but it was east of Denmark, near Kiel, and the mission was in the Baltic.

I returned to base and then selected the Scapa Flow mission.
Made the mission, sank one capital ship, returned to port prior to that mission's deadline.

Eastern British Coastal Waters was not yet visible, so I started a patrol without new orders and immediately docked again and ended it. Time had advanced by a couple weeks and then EBCW appeared.
I selected EBCW and made the mission, also returned a little early.
I advanced time using the aforementioned method as upon I return I saw no further missions. Now I think it's mid-Dec 1939 and I am still not getting any new missions whatsover.
What's more, when I exit the game I am shown that even the missions I successfully completed (like Scapa flow) are 'incomplete'.

I'll add the patch suggested above, last after TWOS etc, but is there a way to continue my current save or is it doomed?