I think this is the appropriate forum for this.
My suggestion is, if you are UK-based, post here. Did your insurance company bottle out and prove useless with "acts of God" and such guff, or did they pay up, no issues?
That way, for buying future travel insurance, people will know who to consider, and who to strike off the list (unless you are happy to knowingly accept such a condition of course).
Don't get into detail about disputes, if you are in a dispute I think that puts them into the Shame category anyway.
And confusingly, my company. Travsure fits into the "dont know' category, verbally they said I would covered but the Ts&Cs actually exclude "if flights cancelled by national air traffic body" or similar wording. And as I haven't claimed I don't know which way they would go..