This is sad news indeed, I only met Will once on a bash in West Yorkshire a few years ago, and we did a bit of a Pacer bash before flooding stopped play and we had a beer at Hebden Bridge while we waited for the decision on where the 144s would then go.
He was certainly a great guy, full of knowledge of all things Northern Ireland Railway-related and really friendly to boot. I haven't seen much of him on here for a while, but I am truely saddened by this loss.
RIP Will, I hope you've got some NIR 450s up there with you. Condolences to the family and, indeed, his close friends too