The employers’ organisation said order books were particularly buoyant for the motor vehicles and transport equipment, and mechanical engineering sectors.The weak pound was helping to swell export order books, even though they were slightly softer than in November, the CBI said. Output rose for 42% of the firms questioned during late November and early December while 11% said production was lower. The rounded balance of +30 points was above the long-term average of +4 points.