My car has felt a bit down on power, so this afternoon I removed the diverter valve to check the diaphragm and sure enough it was split!
So I gave TPS a ring, and they tell me that my "C" valve has been superseded to a "G" valve so I went ahead and ordered one. Just wanted to check before it turns up tomorrow that this is the one to have, being stage 2
Cheers, Ash