To summarise my view on the the third Clan Gunn Chief line when the first two are not extinct -
1) An interlocutor is not a final decision in Scottish law; I note Lord Lyon Sellar's earlier interlocutor rejecting the Commander as Chief from a Convention.
2) Lyon Court rulings are subject to appeal in the Court of Sessions.
3) The Court of Sessions has already rejected Lyon's ability to make any judgement on contested Clan Chiefship matters.
4) So the Clan Gunn Chiefship matter is nothing like resolved - it now requires two legal battles, rather than one, before the real Clan Gunn Chief is appointed. For more detail see http://clangunn.weebly.com/the-new-3rd-clan-gunn-chief-line.html