Went out this morning and found slow puncture of F/O/S tyre changed same and thought will check the annoying rattling in the exhaust system, to find the rattle was within the cat.
Went to remove spare and found some water under the carpet in the boot
What next
I've kept the old cat and I'm think of getting the cat sorted. It has broken where the rear pipe meets the cat at weld. Hopefully this will work and I can send the 6 month old cat back to the seller and see if they will sort something out.
Kenny