[RICKY D]

Thanks for all of the encouraging words guys, it's been appreciated while I've been worrying about it for the past few days.

I got the beast on the ramp today and had a good look with my mechanic. He immediately said its one of your cats breaking up internally (offside one) but he could understand why I thought it was the bottom end knock from outside the car. Underneath it's much easier to see/hear it's one of the cats.

I feel a little silly for panicking now

Thanks to you guys who pretty much diagnosed this well in advance, I was at least able to get some sleep the past few nights

Thank you all ( one relieved S owner)

I have no EML on at the moment but as more breaks up will this trigger it? Thinking long term I guess I will need to replace it. Adrian I will have a search for your thread as that sound like a good compromise. As much as I like OE parts; £950 each