I took the exhaust off the XM tonight so that I can get it patched up in preparation for it's MOT on Monday morning. Here's the little hole that I knew about...
Just behind the patch that I put on it 3 years ago when I first got the car.
I then had a quick look down the rest of the pipework and found this little bugger...
Hopefully should be able to shape a patch round it easily enough.
Strangely though, the back two boxes on my exhaust are stainless steel whereas the front silencer and pipework are still mild steel. The rear boxes were a little dirty so I attacked them with some Solvol AutoSol metal polish and they've come up looking rather shiny

My exhaust is also one piece!
David.