| Code | NA990 |
| Place Entry | Penarth Flats/Penarth/Glamorgan/Wales |
| Notes | Now what is enclosed by Cardiff Bay Barrage |
| Place Name | Penarth Flats |
| Area2 | Penarth |
| Area4 | Glamorgan |
| Area5 | Wales |
| Grid Ref | ST1873, ST1973 |
| Notes | Now what is enclosed by Cardiff Bay Barrage |
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