Leave A1(M) at junction 6 and take third exit off first roundabout and second exit off second roundabout. At third roundabout take the first exit. 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.