I would suggest that you ask UK CAA to issue a separate UK-FCL PPL, and immediately you have that, SOLI your UK issued EASA PPL to Germany. Waste absolutely no time doing this, as the clock stops on December 31st and some authorities are already saying it's too late.
Also look into getting an FAA 61.75 PPL on the back of one of them, probably the German EASA Licence so you can fly N-reg aeroplanes that are available to you. That you don't need to hurry about.