First of all the car should be driven very hot, oil should have at least 80 Celsius temperature. The Coolant temp.sensor must work properly. Light overfuelling causes also hihger CO2. Your Lambda value ist too high
HC should be acc. to Rover emission protocol 200 ppm max.
CO o,3 max Idle 0,5 up to 1,5
If you like it, I can mail you the Rover Exhaust emission protocol. Just send email with pnp