Car passed ok today. Lambda was comfortably within limits. I had taken it for a warm up before hand

and the heat shield I put round the cats over summer would have helped. Only watch point was LH rear brake was slightly lower than RH. Ca4 has only done 1300 miles since last November so that won’t have helped. A good reason to drive it to keep it ok! I’ll do a check next week, the shoes are ok but I may change them early anyway. The Mulfab front calliper/stainless flexi hose with new solid disc upgrade last year is a noticeable improvement. Vented disc? Not necessary for road us in my view. Track....yes.
Anyway, apologies for thread drift.
No fish were harmed during this episode.