Thanks Ian
I have come to the same conclusion and whilst the fitting of a missing exhaust clamp has lessened the issue the cat temperature is critical.
Its not a big issue as I enjoy the car so much and have just returned from a 5 day " spirited" trip to Holland.
It starts from cold in minus temperatures on the button,settles down to an even idle and pulls like a train...can't be much amiss with its setup !!!
FYI
Your car SS04 MOG belongs to SteveLoc on here..My car V4KFH has over 11,000 miles on it ,same colour(but white roundals) and had ECU update last October.
Confusing ?..you never see Supersports then 2 come along in the same colour!!
ALMOND TART