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U, Mathern Chepstow, Monmouthshire (Grid ref ST521913) A466 between A 48T and M48 JCT 2, Monmouthshire (Grid ref ST532920) A466 between A 48T and M48 Junction 2, Monmouthshire (Grid ref ST532920) U, Bulwark Chepstow, Monmouthshire (Grid ref ST537916) U, Thornwell Road, Monmouthshire (Grid ref ST536923) M48 between J2 and Monmouthshire boundary, Monmouthshire (Grid ref ST540914) M48 between M4 (23) and J2, Monmouthshire (Grid ref ST500911) A48 between A466 and England, Monmouthshire (Grid ref ST530934) A48 between Monmouthshire boundary and A466, Monmouthshire (Grid ref ST498903) A466 between B4293 and A48, Monmouthshire (Grid ref ST524940) M48 between Gloucestershire boundary and Gloucestershire boundary, Gloucestershire (Grid ref ST551907) C, Buttington Hill, Gloucestershire (Grid ref ST547933) B4293, Itton Road, Monmouthshire (Grid ref ST511948) U, Sandy Lane, Monmouthshire (Grid ref ST483882) M48 between South Gloucestershire boundary and J1, South Gloucestershire (Grid ref ST569896) M4 between South Gloucestershire boundary and J22, South Gloucestershire (Grid ref ST526860) A403 between B4055 and M48, South Gloucestershire (Grid ref ST560875) U, N/a, South Gloucestershire (Grid ref ST573895) M4 between J23 and Monmouthshire boundary, Monmouthshire (Grid ref ST480872) B4228, N/a, Gloucestershire (Grid ref ST546970)