My wife inadvertently put diesel into her petrol Forester & drove until car quit

What is your question?

All necessary work, flushing of fuel system & injectors, was carried out by our local Subaru dealer and car runs fine, but they can't clarify if the catalytic converters have been damaged and whether one or both converters need to be replaced. After getting the vehicle running there was a sound of loose metal bits coming from in and around the exhaust system and the dealer claims to have retrieved small metal fragments from the front catalytic converter. Subaru dealer claims they've not had this type of issue on current MY13 model and cannot advise further until a similar incident occurs elsewhere? Any insight / guidance is welcome.