Saw some of the photos...was it a broken rail that caused it?
I know the guy in the stocking hat...Nathan. He knew my brother and he met us down in SA in 1977 and 1984. Good guy, and he has been a big part of that organization(Friends of the Rails) for many years. I hope the 15F was not damaged too badly. Sad when something like this takes place. I believe their base of operation is Capitol Park, in Pretoria.
For those that do not know this is 3 foot 6 inch gauge, and a 15F is a modern 4-8-2. Nice sounding engines also.
Greg Scholl