| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated March 2006 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated December 1997 | |
| England | Hertfordshire | Large | Terminated March 2003 | |
| England | Hertfordshire | Large | Terminated June 1998 | |
| England | Hertfordshire | Large | Terminated April 2019 | |
| England | Hertfordshire | Large | Terminated December 1998 | |
| England | Hertfordshire | Large | Terminated June 1997 | |
| England | Hertfordshire | Large | Terminated June 1997 | |
| England | Hertfordshire | Large | Terminated July 1997 | |
| England | Hertfordshire | Large | Terminated December 1998 | |
| England | Hertfordshire | Large | Terminated June 1997 | |
| England | Hertfordshire | Large | Terminated December 2008 | |
| England | Hertfordshire | Large | Terminated September 2007 | |
| England | Hertfordshire | Large | Terminated June 2008 | |
| England | Hertfordshire | Large | Terminated July 1997 | |
| England | Hertfordshire | Large | Terminated December 1997 | |
| England | Hertfordshire | Large | Terminated September 2011 |