TD,
78 incidents of Fires were recorded
355 incidents of Fumes/Smoke
Are you able to tell us where you got the above stats from?
You quoted specific numbers, therefore the stats must be based on a structured analysis. Is it possible that someone has a done a simple word search for "fire" in all the incident reports. This will cause "hits" in routine sentences such as "the crew suspected fire", or "the crew carried out the Fire or Fumes in the Cabin drill"..."
There have not been 78 fires on the Nimrod aircraft. That kind of record on a relatively small fleet, would never have been allowed to build up.
Regards
Ed Set