The Malcolm Wilson Rally uses both Comb & Hobcarton, which are in the Whinlatter Forest park; they'd probably have to run early in the morning, as the Forestry want the forest back as soon as possible.

And Yorkshire is interesting, as the amount of events allowed is drastically reduced; Dalby, Langdale, plus Cropton, and maybe the stages near Helmsley. Then you have the issue of overnight parking; would it be relaxed for RallyGB?