Leave A1(M) at junction 6 and go straight across first two roundabouts. Turn left at the third roundabout and turn right at fourth roundabout. Follow B656 to Codicote. Drive through High Street, turn left opposite "The Bell Inn" into Heath Lane. Go downhill over small bridge, see house ahead, which is Codicote Bottom Farm. Pull up to gate, which will open automatically for you. Drive through the yard, John Warren Cars is the last industrial unit on the left.