Stiles

Once again from the ubiquitous Wikipedia, a description and images:

A stile is a structure which provides people a passage through or over a fence or boundary via steps, ladders, or narrow gaps. Stiles are often built in rural areas or along footpaths to allow access to an adjacent field or area separated by a fence, wall or hedge. Unlike a gate, there is no chance of forgetting to close it, and should the stile break, the fence remains intact (livestock cannot escape).

And a mention from our beloved Irish R.M. by Somerville and Ross: 

Up the road a hound gave a yelp of discovery, and flung himself over a stile into the fields; the rest of the pack went squealing and jostling after him . . .

Stiles are almost nonexistent in this country.  When you do see them, they're generally a tight pass-through rather than a modified set of stairs.  And those are usually not jumpable.

They're certainly mentioned with frequency in the literature so one assumes they're fairly common in England.