https://www.thisismoney.co.uk/money/...r-thieves.html
I must admit that if I owned a car that was high risk I'd be thinking about having two exhaust systems made up one with cat for MOT time and one catless for the rest of the time.. Non ethical I know but !!
Have a look on the Copart site more and more write offs appearing with listing of underbody damage and usually means stolen cat