From Exeter
Leave M5 at Exeter, taking the A30. Keep on this road, until St. Austell/Bugle signposted. Take this road for approx (very) 8 miles, going straight ahead at the traffic lights in Bugle, until mini roundabout.
 
Although the road is signposted left to St. Austell, IGNORE this sign, and keep straight on following directions to Carthew.  About 3 miles on, passing under a viaduct, you will pass the Fire Station on your left.  Almost immediately afterwards, you will see, again on your left, some iron gates which mark the entry to the shops area which is pedestrianised until 6.00pm. After this time, drive through, coming out by the Church.  Keep Church on the right and about 100yds ahead, on the left, is a No Through Road - the Church Hall is then up the hill, on the right.

From A30 at Roche
Take road to St. Austell, turn right at mini roundabout by Roche Church, then on to mini roundabout, where straight ahead signposted St. Austell, and right to Carthew. Take Carthew Road and follow directions as above

A38 from Liskeard
At Dobwalls, turn left at traffic lights, signposted St. Austell.  Keep on this road toward Truro, for approx 20 miles, until reaching a double mini roundabout - Mevagissey is signposted off this roundabout, but take the third turn to Town Centre.
Keep up the hill until you face a cream coloured building, with Mortgages etc written on it. Turn left, and you arrive at the Church. Keeping Church on the right, go three quarters of the way around it, until facing an Estate Agents. On the left is a No Through Road - the Church Hall is up the hill on the right 

From Truro
Travel along A390 until, just after passing Restormel Council Offices on the right, you reach a double mini roundabout. Take 1st left, then follow 2nd paragraph as from Liskeard

From Newquay via St. Stephens
Travel towards St. Austell, until you reach the A390. Turn left towards Liskeard. Keep on this road, as for Truro, and then follow 2nd paragraph as from Liskeard.