The dash was damaged, but (very surprisingly)was recoverable with a few hours and a heat gun and a lot of patience. The sheet metal under the dash was bashed in pretty good too,but was left alone, because to bend it back into shape I'd have had to remove the steering column, the whole dash, etc, and when it's all back together you cant see it.
The insurance company, after the very very slow response was good. (took them a month to get an adjuster out, but there were also a ton of storms in that time so they said they were swamped, and my car, being stationary and in my yard, was just a low priority)
The adjuster actually recommended that in the future I drop the coverage on the triumphs and go with specialty insurance for them. He was surprised that my insurance company even wrote a policy for them, since they're not longer even in the adjustment books. I had to spend time on rimmerbros.co.uk and other pages showing him what replacement parts cost so he could make his assessment of the damages.
The passenger door doesn't close quite as smooth as it used to, but right after the collapse it was really sticking. The striker plate, door latch, and one of the hinges were fiddled with and now it opens and closes easy again, though not /quite/ the 'refrigerator door' smoothness that it used to have.