Map
General Information
| Postal Area | Wirral |
| Postcode | CH1 1YD |
| User Type | Large (more than 25 items of mail per day) |
| Region | North West |
| Country | England |
| Local authority | Cheshire West and Chester |
| Introduction Date | 1982-03-01 |
| Termination Date | 1990-12-01 |
Geographic Information
| Latitude | 53.1912640 |
| Longitude | -2.9024570 |
| Easting | 339800 |
| Northing | 366400 |
| Quality | Postcode terminated prior to Gridlink® initiative, last known ONS postcode grid reference |