I do not think that recent Ford models any link with UK, as now there is just Ford Europe, which is based in Germany. They only had some production plant (and now they don't have them anymore).
And Escort mk1 didn't had any link with Germany, so for these it should be always UK.
I do not know for all old Ford models, but I do not think that there are so many shared between UK & Germany. We should clean that.