Bulleid Pacifics did 26 years service for Southern Railway/ British Railways. In that time they were driven by hundreds of drivers and maintained by hundreds of fitters. For most of the staff, they just got on with it. A few, years later, decided to write books or contribute articles to publications. Preserving in aspic their own opinions and prejudices for years after. Bulleid Pacific’s have operated almost continuously in preservation since 21C123 was restored to use in 1976, 46 years. The preservation movement has built up considerable engineering experience over those 46 years. Coupled with a level of interest that far exceeds anyone who worked on them “first time round”. Ive been involved with maintenance of Bulleids for 16 years. Both original and detuned versions. There really isn’t much between them as to reliability. The same things go wrong equally often on both types: blower valves, steam brake valves, injectors, clacks.