Individual Coroners decide what happens to the papers very many of them were destroyed by the coroner, hence there are regional variations in survival. The appropriate county record office, will almost certainly know what is available and where it is. While they are within the definition of public records and open to the public after 75 years many will not have survived those 75 years. Once 15 years old the records can be weeded,' that is destroyed or sampled by the individual coroner concerned. Newspapers usually gave a very full report and is the best bet.
Stan