Leave the M6 at junction 2 and take the A4600 exit at the roundabout (not the A46) Follow the road (dual carriageway) for about 3 miles. You will come to a bus lane which requires you to move into the right-hand lane. Continue forwards and at the bottom of the hill is a roundabout. Turn right at this roundabout. Harefield Road is the 4th road on the left and the Church is on the right.