I have a few used in a Stonehenge saga at one point, though how useful they are might depend on how well our version of Stonehenge meshes with your own saga.
Border War
Covenants in the north of the tribunal have been having serious trouble with raids from Loch Leglean. There are very few quesitores in LL, and they are active participants or turn a blind eye to the raiding due to links with the covenants involved. Because of this the affected covenants have no recourse to retreive stolen property except counter-raiding, and this has only drawn other LL magi into the dispute due to being mistakenly targeted. The covenants in question have tried appealing to Magvillus for some kind of special investigation into LL, but nothing has come of it so far (house Guernicus is spread thin). They want to present the issue to the grand tribunal and ask for mediation between the tribunals, and an external investigation or replacement of the LL quaesitores.
However, this issue only affects a few covenants - the raids never reach further south than the Humber and that means the majority of Stonehenge covenants are unaffected (in our saga the northern magi couldn't convince the rest of the tribunal about the importance of this to their great annoyance).
The Hibernian Problem
"English" magi in Hibernia (many from Stonehenge, some from further afield) who want to make the tribunal more like a conventional one are in conflict with the native Hibernian magi who want to preserve the unique traditions of the tribunal. Some magi in Stonehenge are very involved with this "project" or have very strong views on the matter and want to present it to the grand tribunal. However, they can't agree on what they want to propose! The different factions on this matter in Stonehenge (in our saga) are:
Major View - Gradual Reform: Led by the tribunal Tremere, this group wants to pursue a gradual reform within the Hibernian code. They see time as being on their side and want the grand tribunal to act to prevent any open conflict in Hibernia. They don't want the grand tribunal to overrule Hibernian tradition, because they think they can erode it over time anyway with less risk. Being led by Goliard of Blackthorn, some magi who would be members of this faction are put off by the association.
Major View - Harsh Reform: This group want the grand tribunal to overrule aspects of the Hibernian code they see as "problematic" or "unlawful". It has no single leader, but is popular among less informed magi. They have no plan for what comes after, only objections to existing Hibernian traditions.
Fringe View - War: This group, led by some of the more militant magi of the tribunal, wants the treaty of Cnoc Maol Réidh declared invalid and immediate "Join or Die" style aggressive action against the Coill Trí and any magi who defend them. Tantamount to declaring war on the native magi. In our saga some senior members of house Tremere covertly support this view (in opposition to their own house's official stance), and have been secretly fomenting conflict in Hibernia. Stonehenge magi naturally blame Blackthorn for this, despite their (in this case genuine) protestations of innocence.
Fringe View - Official Recognition: Some Stonehenge magi, led by Cad Gadu, have strong ties to Hibernia and approve of their unique traditions. They have been secretly working with Hibernian magi to present a case to the grand tribunal for adopting aspects of the Hibernian code across the Order of Hermes. In particular they want the grand tribunal to ratify the treaty of Cnoc Maol Réidh (and create precedent for similar agreements with hedge wizards in other tribunals possibly) and to approve the practice of "ambassadors" from the supernatural realms at tribunal. If they can get one of their own as Stonehenge representative then they will have a strong base of support - in our saga Loch Leglean, Hibernia itself, Ex Misc, Merenita, and Bjornaer were all in support, and others could be won over with the right arguments.
Major View - Who Cares? A faction of magi who think that Stonehenge should look to itself instead of meddling in other tribunals. They will object to the idea of using one of the Stonehenge proposals on a matter relating entirely to Hibernia.
Rune Wizards in the North
In our saga we drew a lot from the Hermes Portal version of Mann and the Isles, which includes living rune wizards. Discovery of rune magic being actively used in the region, even by just a handful of scattered practitioners, will send some (paranoid) magi into a panic over the "Order of Odin". Others may view this as little more than scaremongering and conspiracy theory. There will certainly be voices arguing it should be presented to the grand tribunal, however circumstantial the evidence. Other think it's nonsense. A third group believes the rune wizards exist, but don't want to report it for fear of the conflict it will bring to the tribunal.
Except for Mann itself the isles are in Loch Leglean and they may have their own views on the matter. Further the Partitio Manoviae which places the Isle of Mann outside of any tribunal (for now) makes the whole matter even more complicated. The matter gets yet more inflamed when war breaks out in the isles in the late 1220's leading to a Norwegian fleet being send to the isles (and potentially bringing non-hermetic norse wizards with it) under the command of Óspakr-Hákon.
Unknown to the tribunal at large a group of Verditius and Ex Miscellanea in Stonehenge and Loch Leglean are fully aware of the rune wizards and have been trying to recruit them to the Order in secret. If that is found out it will cause a huge stir - hermetic magi collaborating with the Order of Odin!