Gave it a bit more stick going to and back from "Twiddle Day". 4000 rpm in 3rd, up motorway inclines and even up to 5000 accelerating in 3rd (when you overtook me Pete I WAS tootling, though ONLY because, trying to glance at map, as thought I was bit lost. Ha.
Anyway. Suspect plug was clean and healthy looking when got home and car felt crisper and pulling better.
Wow, anyone can feel like there driving a Ferrari, after a good old fashioned, "Italian tune up".
Dave