In reply to fire_munki:
Thanks fire_munki
To the OP: It's true, Luxulyan is by far the nearest bouldering, trad and sport to St Austell, just on the outskirts of town. However the developed bouldering tends to top out at 7A rather than start there, so might not be for you.
Closest granite bouldering at V6 & up is Helman Tor with a couple V6s, 7s and 8s each and a V9. For harder stuff, head to the north coast as you seem aware. Hopefully someone else can advise you. Hartland is miles and miles away however.
HTH,
Tom