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A5183 between A41 and A411, Hertfordshire (Grid ref TQ176950) A41 between Hertfordshire boundary and A5183, Hertfordshire (Grid ref TQ175944) A411 between A41(T) and A5183, Hertfordshire (Grid ref TQ170951) M1 between A41 and LA boundary, Barnet (Grid ref TQ175943) A41 between M1 spur and Barnet boundary, Barnet (Grid ref TQ176942) M1 between Harrow boundary and Harrow boundary, Harrow (Grid ref TQ169946) A5 between Harrow boundary and A41, Harrow (Grid ref TQ173942) A41 between A5183 / A5 and A411, Hertfordshire (Grid ref TQ164950) A411 between A409 and A41(T), Hertfordshire (Grid ref TQ160950) C, Aldenham Road, Hertfordshire (Grid ref TQ165965) A5 between Barnet boundary and A410, Barnet (Grid ref TQ180932) A41 between A410 and M1 spur, Barnet (Grid ref TQ184933) A409 between Hertfordshire boundary and A411, Hertfordshire (Grid ref TQ156945) A410 between A5 and A41, Barnet (Grid ref TQ185930) A4140 between A410 and Harrow boundary, Harrow (Grid ref TQ160934) A410 between A4140 and A5, Harrow (Grid ref TQ180927) U, Ashdown Drive, Hertfordshire (Grid ref TQ185971) A409 between A4140 and Harrow boundary, Harrow (Grid ref TQ154940) A411 between A5183 and A1(T), Hertfordshire (Grid ref TQ200954) A411 between A4140 and A409, Hertfordshire (Grid ref TQ150946)