Try my handy mid-south map, .........
http://www.oople.com/forums/showthread.php?t=10465
CML can be tricky, down the lane further than you think, then up the drive further than you think, with any luck someone will pop some waymarks at the corner's. slow up the drive, lee's dogs, chickens, goats and horses are not to be spooked, not to mention his Mum & Dad.
RG19 8LR is what you need, but the map can zoom into the field at all locations. and its no use getting halfway there and guessing. Good Luck