You should become a journalist. Apparently no one else thought to ask that in the recent blog articles circulated. So I checked....
Find A Grave has an entry for an Angus Barbieri, buried in the town cemetery where he resided per the news articles (Tayport, Fife, Scotland) with a death date of September 7, 1990. If this is the same Angus, he would have died about age 50.
Relatively young. I always wonder how fasting etc... impacts long term health... Still with him being so heavy before there could have been other issues.