Different regions of Britain have different styles of hedging and walling. For example "Devonshiring" is quite a distinctive mud bank with very dense hedging made up of a huge number of species. There will be a narrow or very narrow road running with hedges either side at around six to 12 foot high. My uncle's farm near Dartmouth (Devon!) is a good five miles through a lane that often brushes your wing mirrors on both sides simultaneously. Passing places are sporadic but usually less than 500 yards apart - often gate entrances.
On moorland, dry stone walling is the usual delimiter, see Bodmin (Cornwall), Dartmoor Exmoor, and heading up north - The Peaks in Derbyshire(ish), the Yorkshire Moors, etc and most of Cumbria and Northumberland.
One of the odd regions out is the New Forest (laid out about 1000 years back for King William I) This region famously isn't enclosed and is also mostly no longer forest too.
I've only covered England but Wales, Scotland and Ireland have their own varieties of land demarcation, mostly involving hedges of some sort unless moorland in which case stone is generally indicated in exposed areas but all are largely familiar to each other.
The article goes on about maintenance. Farmers fit a a device called a flail to the back of their tractors and trim the hedgerows after birds have fledged. They trundle along at around a slow walking pace. It can get a bit dicey driving in a lane in mid to late spring time because the overgrown hedges block your oncoming view.