| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| England | Hertfordshire | Large | Terminated June 2000 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated December 1992 | |
| England | Hertfordshire | Large | Terminated June 2000 | |
| England | Hertfordshire | Large | Terminated February 2006 | |
| England | Hertfordshire | Large | Terminated July 2001 | |
| England | Hertfordshire | Large | Terminated December 2005 | |
| England | Hertfordshire | Large | Terminated March 2007 | |
| England | Hertfordshire | Large | Terminated February 2006 | |
| England | Hertfordshire | Large | Terminated February 2006 | |
| England | Hertfordshire | Large | Terminated July 2003 | |
| England | Hertfordshire | Large | Terminated July 2007 | |
| England | Hertfordshire | Large | Terminated October 2013 | |
| England | Hertfordshire | Large | Terminated August 2007 | |
| England | Hertfordshire | Large | Terminated October 2005 | |
| England | Hertfordshire | Large | Terminated February 2008 | |
| England | Hertfordshire | Large | Terminated July 2001 | |
| England | Hertfordshire | Large | Terminated July 2001 |