I didn't fully mean that but I wouldn't feel 100% comfortable if there was a fatal road accident and you were coming back from a track day on them, the non E mark MIGHT get a Barrister excited????. I think many of my track tyres were legal when brand new but after about 100 miles on track were probably not legal on the way home even though they had life left in them.

When I first stated using Michelin Pilot Cup Sports about 10 yrs or more ago there were a few issues with the Police and Insurance companies challenging the legal use even though they were sold as road legal. I believe the tread patter (what little there was of it) was changed slightly which sorted it out. It was something to do with the % of the edge of the tyre having enough depth but I cannot fully remember.