I'm very sorry to hear about Tony Brewster. As a long time neighbour at Kolombangara at the top of the Ward Hill in Sumburgh, I used to have great conversations with him, and also run into him out hiking all over the place. A very pleasant and interesting gentleman.
For DavidCg, I might take a guess that your colleague in Iran was Frank Brimelow? I read on here once that he was living in Oz now as well.