I think I’ll have my local independent take a look at this. They are an Audi specialist and always looked after my S3 before I changed that for my F-Type, and Mrs W’s S4 Quattro very well. A local friend has his Aston DB9 maintained by them and gives good report, so I reckon an engine light fault on the F-Type will be no challenge for them. I can’t be arsed to go up to Bristol from South Somerset for Sytner Jag to do it, even if it is under warranty.