| Location | England Hertfordshire Westmill |
| W side of: A10 | |
| Distance (N) from Greenwich | |
| OS map details | OS Explorer: 194 |
| OS grid ref | TL 37520.27016 (537520,227016) |
| WGS84 lat/long | 51.924685, -0.001536 |
| Type | Bollard |
| Marking date | 1984 |
| Access | Unrestricted |
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