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U, Williams Way, Hertfordshire (Grid ref TQ169999) U, Newberries Avenue, Hertfordshire (Grid ref TQ171996) A5183 between A411 and Park Street Lane, St Albans, Hertfordshire (Grid ref TL163000) U, Haggerston Road, Hertfordshire (Grid ref TQ183981) B556, Harper Lane, Hertfordshire (Grid ref TL174023) C, London Road, Hertfordshire (Grid ref TQ194999) U, The Campions, Hertfordshire (Grid ref TQ190982) U, Redwood Rise, Hertfordshire (Grid ref TQ195985) M25 between J21A and J22, Hertfordshire (Grid ref TL162027) B556, Bell Lane, Hertfordshire (Grid ref TL181027) U, Ashdown Drive, Hertfordshire (Grid ref TQ185971) B5378, Cowley Hill, Hertfordshire (Grid ref TQ197982) C, Aldenham Road, Hertfordshire (Grid ref TQ165965) U, Barton Way, Hertfordshire (Grid ref TQ190972) U, School Lane, Hertfordshire (Grid ref TL133010) U, Shenley Lane, Hertfordshire (Grid ref TL173037) A1081 between B556 W and M25 (midpoint), Hertfordshire (Grid ref TL190032) U, Denham Way, Hertfordshire (Grid ref TQ203978) A5135 between B5378 and Newark Green roundabout, Hertfordshire (Grid ref TQ200970) A41 between B462 and A4008 / M25 J5, Hertfordshire (Grid ref TQ131978)