Haha!
Looks a bit more complicated than with the old Racetecs, you only had a choice of three in your size...
I'll do a bit of research, want to make sure I get the right ones.
Got a juicy bonus from work- tyres are now a priority!

OK got to the bottom of it:
Power 1 - Front and Rear (Road)
Power 1 B Compound - Front and Rear (Track Day)
Power 1 A Compound - Front and Rear (Track Day and Qualifier)
Power 1 V Compound - Front Only (V Profile (vs. U) Front A Compound)