In this draft, Leeds, Edinburgh, and New London are completely under Gallic occupation. There is fighting in Manchester and Newcastle, but against Liberty, not with standing Bretonian forces. Bretonia would've been reduced to Cambridge, Omega-3, and Derry (which is the name Poole would'v received).
As it stands now, Gallia only has one non-contested Bretonian system under their control. There aren't Gauls peacefully living in Leeds and New London or anything of the sort and that's not likely to ever happen. The current situation barely qualifies as an occupation. Whether or not it becomes one is something I'll decline to comment on.
As for Cambridge not being a government in exile, you're right. It isn't. I did make a note at the very top of the thread that this draft contained needless amounts of edge. Part of this includes the use of cool terms without them actually being applied correctly.