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A410 between A4140 and A4140, Harrow (Grid ref TQ171923) A410 between A4140 and A5, Harrow (Grid ref TQ180927) A410 between A409 and A4140, Harrow (Grid ref TQ160919) C, Gordon Avenue, Harrow (Grid ref TQ161916) U, Algar Close, Harrow (Grid ref TQ159921) A5 between Barnet boundary and A410, Barnet (Grid ref TQ180932) A4140 between A410 and Harrow boundary, Harrow (Grid ref TQ160934) A410 between A5 and A41, Barnet (Grid ref TQ185930) A41 between A410 and M1 spur, Barnet (Grid ref TQ184933) U, Ventnor Avenue, Harrow (Grid ref TQ168904) A5 between Harrow boundary and A41, Harrow (Grid ref TQ173942) A5 between A410 and A5100, Barnet (Grid ref TQ190919) B461, Whitchurch Lane, Harrow (Grid ref TQ187913) A41 between M1 spur and Barnet boundary, Barnet (Grid ref TQ176942) U, Ashcombe Gardens, Barnet (Grid ref TQ191926) M1 between A41 and LA boundary, Barnet (Grid ref TQ175943) U, Kenmore Avenue, Harrow (Grid ref TQ164903) A409 between A410 and A4140, Harrow (Grid ref TQ149920) A41 between Hertfordshire boundary and A5183, Hertfordshire (Grid ref TQ175944) A410 between A4008 and A409, Harrow (Grid ref TQ150915)