Is this car in original configuration? Does it have a catalyst? O2 sensor?

Was the test just run at idle (tickover)?

Did you fully warm up the engine and leave it idling before the test, and NOT SHUT IT OFF? How long did you wait?

Your HC (hydrocarbons) and CO (carbon monoxide) are very high for a lambda equipped (O2 sensor) engine - even one with no catalyst.

Did your brother-in-law offer any suggestions as to what the problem is?

What were the results for previous tests?

What is "m.o.t."?

Duke