If you want specific details over a period of ????? years then the likely way is to find old copies of the recorder and catchpoint.
There was no way around Callington so a derailment there bought the whole southern system to a halt.
The details were usually recorded the month after so a derailment would be from say December in the January mags, and photos in the February.
The details would be Locos, number derailed, line closed for X hours or days, was a deviation built. first trains through after reopening, did accident crane attend?
I can remember seeing a photo of a piece of rail that speared into an Overland sleeper ( empty birth) In the seventies (( my memory is not that good for specific times.)
Basically if you want the details you need to search.
There are plenty of complete sets of catchpoint and recorder available.
The reason for the delay in photos was pre digital.
Had to finish the roll of film, send it to be developed, get it back , post it to the mag editor, have it meet deadlines, then be published.
Not like today.
This brings to my thoughts that a LONG TERM project could be to scan and load these type of magazines. There are fifty or so years of magazines that could record a lot of interesting information.
Comrails is a fantastic site ,but there is not a lot of detailed information elsewhere so if some young person wanted to contribute something to the scene in general it would be a helpful resource. Chris has devoted many years to a project that is not complete yet.
This goes down to when wagons were issued to traffic, condemned converted etc.
Would be a better contribution to the place than nit picking foamers.
Like the American army recruiting poster
THE SA RAILSCENE needs you!!! pointing a big finger at you.
Ask what you can do for the scene rather than what it can do for you.