MoT failed on CO emissions

Took the FL1 for MoT last week. Advisories on slight corrosion on brake pipes and fuel tank cradle but failed on CO emissions (reading of 0.6%, all others within spec). Read ecu with T300 diagnostic meter, no faults stored. Replaced distributor cap, rotor arm, plugs, leads, filters and oil for retest, Same result! Exhaust note has always been somewhat 'rorty' so wondered if the cat was okay? Removed for examination and found all internals were missing!. New cat fitted today and back for test...Passed no problems!

Yep, platinum is worth a bit.....