From M25 junction 28, take the A12 towards chelmsford, then exit onto he A414 towards chelmsford. At the roundabout turn left towards Harlow staying on the A414, then take the 2nd roundabout turn left signposted towards Highwood, follow the road past the Pub, Church and School, then take the 2nd turning on the left past the school "POOLES LANE" follow drive down to very end and bear left you will see 3M'S AUTOS in front of you.