Complex sentence: There were a number of exhaust fires on the "Voyager" class during 2005--2006 due to incorrect fitting of equipment during overhauls; with fires occurring at Starcross (Class 221), Newcastle, and on 19th Jan 2006 at Congleton.
Split into simpler sentences: There were a number of exhaust fires on the "Voyager" class during 2005--2006 due to incorrect fitting of equipment during overhauls. Fires occurred at Starcross (Class 221), Newcastle and on 19 Jan 2006 at Congleton.