Very sorry to hear that. I met Ian at Vinson BC some years ago and we chatted quite a bit. He was a real character, genuinely into his cause. He made it very clear he had no pretensions to mountaineering stardom but did very well on his quest.
I often recall a big multi-person survey Ian started in the dining tent, asking who they thought was the best sportsperson at their given sport. Ian agreed with me about Roger Federer, but could not be brought around to Shane Warne.