I'm no expert on what those readings may be telling, but as a starting point, has the car been serviced recently? Does it need a new air filter, new plugs (assuming it's petrol)? Is the car used for short journeys only? An italian tune-up i.e. taking it for a decent 30+ mile run where you get the revs up can help to clear it out.

The Lambda readings on 2nd fast idle would be the main problem, Replace the lambda sensor (before cat) and as long as it hasn't already burnt the cat out youll be fine.

as a guide the lambda readings should be 1.00...this is equal to 14.7 parts air to 1 part fuel, in other words perfect burning ratio for unleaded fuel.

If the readings go higher than 1.00 that means the mixure is too lean, a reading under 1.00 means too rich, there is a tolerance since its virtually impossible to maintain a perfect reading, for MOT purposes this tolerance is 0.97 to 1.03, but if it fails this level it will give you a 2nd chance depending on the age of your car with a wider tolerance level.

anything over or below this would suggest a problem, many factors can affect the Lambda readings, temp sensor, MAF sensor, faulty injector etc, but 9 times out of 10 the lambda sensor is the culprit, for those vehicles with 2 sensors..the one before the CAT (sensor 1) is the main sensor that reads the oxygen levels, the sensor after the CAT purely monitors how well the CAT is performing

because your lambda readings are so low (too rich) this in turn is causing your CO to be too high.

The HC will always fail if there is too much fuel, HC is hydro-carbons, which is basically unburnt fuel, this is also an indication that your fuel level is too rich, but high HC levels can also mean poor combustion.