The Stonehenge Tribunal to the east of Man is the dominant political force in the British Isles. It is a participant in the Partitio Monaviae. Most of the covenant's information on Stonehenge comes from Conrad the Redcap, who grew up there.
The tribunal has long been dominated by Blackthorn covenant, where tribunal meetings are held. Recently, a concerted push by magi young and old has broken Blackthorn's strangehold, but they remain the single most powerful force in Stonehenge politics, opposed by a coalition of other covenants.
Stonehenge is the most traditional of all the tribunals in the British Isles, and has considerable influence over the Order as a whole.
There is a single Mercer House in Stonehenge, near Coventry. There are five Redcaps there who deliver mail to the various covenants; the eldest is Perceval. His wife Lucy maintains the house with the help of several elderly and retired Redcaps.