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C, London Road, Hertfordshire (Grid ref TQ194999) U, Redwood Rise, Hertfordshire (Grid ref TQ195985) U, The Campions, Hertfordshire (Grid ref TQ190982) B5378, Cowley Hill, Hertfordshire (Grid ref TQ197982) U, Haggerston Road, Hertfordshire (Grid ref TQ183981) U, Denham Way, Hertfordshire (Grid ref TQ203978) U, Newberries Avenue, Hertfordshire (Grid ref TQ171996) U, Williams Way, Hertfordshire (Grid ref TQ169999) M25 between J23 and J22, Hertfordshire (Grid ref TL217011) U, Barton Way, Hertfordshire (Grid ref TQ190972) A1 between A5135 and A1M, Hertfordshire (Grid ref TQ220990) U, Ashdown Drive, Hertfordshire (Grid ref TQ185971) A5135 between B5378 and Newark Green roundabout, Hertfordshire (Grid ref TQ200970) A1 between A1M and M25, Hertfordshire (Grid ref TQ223998) A1 between A1 and M25, Hertfordshire (Grid ref TQ224999) A5183 between A411 and Park Street Lane, St Albans, Hertfordshire (Grid ref TL163000) B556, Bell Lane, Hertfordshire (Grid ref TL181027) B556, Harper Lane, Hertfordshire (Grid ref TL174023) A1081 between B556 W and M25 (midpoint), Hertfordshire (Grid ref TL190032) U, Kenilworth Drive, Hertfordshire (Grid ref TQ203965)