Judging by the conditions in the woods around Brighton it’ll likely be wet enough to not be too sticky. i.e. I’d expect muddy but not too much super sticky mud stopping the wheels rotating like we sometimes get. It us slippy though, so watch out for chalky smooth bits. And that wind will be pretty harsh along the tops if its still gusting although you’re going the right way for a bit of a following wind on the uphills. Should be fun if you’re well wrapped.