Doesn't matter really. Think most people by passed that I had already brought one and was fitting it tonight. Regardless, I don't want to bodge job my car as its just not how I am, changed the CAT on my drive this evening, only took a few hours. Not any good at welding so couldn't be arsed with that when I'd need a CAT anyway as it would fail MOT as it was made after 92. I know a few places that would pass it next year if I had welded a spacer in but I'd rather keep it OEM in that sense and keep it legal rather than cutting corners. Wasn't that much anyway, just less than £140 for the set up and nowt to fit on my drive. Immediately she's more responsive and smoother to drive. Quite chuffed. Thanks anyway guys but it was just an update.
jadelauren's post in Help! White Smoke from Exhaust was marked as the answer