There is no such thing as jaywalking in the UK, it's neither an offence (with the exception of motorways, which also regulate the type of vehicle which may enter), nor a term that's widely used or understood.

Outside of cities, there are lots of roads without pavements (not just in super-rural areas). Walking on them is normal, and people know how (e.g. always walk on the right, facing oncoming traffic).

And I very much hope it stays that way. Cars should not rule our public spaces.