Yesterday afternoon I caught the 1658 Norwich to Lowestoft service home from work as both the A47 and A146 were buggered (pretty much typical nowadays sadly ). The unit I had was 156412, sitting in the second carriage. When we attempted to pull away from Reedham it sounded like the engine in this carriage wasn't working properly. It was idling away while the engine in the first carriage was accelerating attempting to pull both carriages, resulting in a noticeably slower (and quieter!) departure. Eventually the engine in our carriage started revving and accelerating as normal, but it was a surprising delay. The same thing happened again trying to depart from Haddiscoe and at Somerleyton. It seems like a strange fault. Has anyone else experienced DMUs running on one engine, and before some wisecrack pipes up, no we're not counting single Bubble Cars or single 153s here.