There are numerous multi-cellular, or honeycomb, sheep pens in North Wales, in much of Britain they are unknown or rare at best, and then rarely stretching to more than 4 or 5 cells.
AS OF 26-8-16 IF YOU ARE LOOKING AT THIS PAGE IT MAY WELL BE BEING UPDATED AS YOU DO SO
Images are from Google earth, click on image to give a larger version all these images (including thumbnails) are from around 200m above the pens and so should provide relative scale
Click on image name for 600x400 image on same basis
click on satellite reference to give a close up
Titles are for location reference only and might not be what local farmers/users call them... time will tell I hope
The greatest concenration is probably on the Carneddau where they run into double figures (20+ ?). The next greatest concentration can be found on the Rhinogs (Or so I'm told... can't find any).
The mountain grazing around these pens is on common land. The farmers/commoners would all have had a pen, sheep would have been rounded up from the pens associated Cynefin (in the unfenced uplands flocks stick to their 'homelands'), and divided to pens depending on their ownership.
The use of these pens has declined in recent years and the merging of flocks/increased sizes means many of the cells are too small.
A number of sets have been repaired in recent years, with funding from the Snowdonia National Park's Tir eryri scheme.
Most of these pens are on National Trust land.