From The Port of Dover:

Drive out of the port, Drive straight across the roundabout outside the port towards Dover. (Do not turn left up the hill (Jubilee Way) Go on to the next roundabout take the right exit, drive on to the next roundabout and go straight across to a set of traffic lights which are under the town hall clock. Drive straight over these lights and over the next three sets of lights, at the third set you will see an old white mill on the right-hand side of the road continue past the mill and Eric Road is the second turning left opposite the Old Endeavor Public House we are half way up Eric Road on the Right Hand Side.

From Eurotunnel:

Drive out of the Eurotunnel site and follow the signs for Dover A20 go straight over first roundabout and down the hill, straight over the next two roundabouts at the next roundabout turn left, drive on to the next roundabout and go straight across to a set of traffic lights which are under the town hall clock. Drive straight over these lights and over the next three sets of lights, at the third set you will see an old white mill on the right-hand side of the road continue past the mill and Eric Road is the second turning left opposite the Old Endeavor Public House we are half way up Eric Road on the Right Hand Side.