I havent run my car on it on the full track, but when i did run round partially i used last years old yellows, in the dry and there was stacks of grip..
I think they were all using an assortment of old tyres yesterday - yellows/greens, not sure if someone had ballistics and the track was absolutely wet through...
So basically i'd imagine in the dry - anything but perhaps lean towards yellows.
Wet - yellows/greens ...
they looked to be fine
Im sure the others will be on here with comments later...