Rob- I'll be in the car park for 1pm- is that cool? What are you riding?
Gav- you have a blend of dirt jump style pieces, some very cool downhill and some freeride kind of stuff. Also some XC fire roads etc. It's the ultimate place in the SE Essex area for sure.
You need to park in Bicnacre Road car park. At the top part of the car park you have a bridleway that goes left and right. Follow it right, keep going past a junction, and follow it up the long, gentle hill into the woods.
When you get within viewing distance of a big house on your left- look right and then use your noodle and explore!
Take a helmet and gloves
and very much consider dropping your seat as low as it'll go