| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| England | Hertfordshire | Large | Terminated January 2007 | |
| England | Hertfordshire | Large | ||
| England | Hertfordshire | Large | Terminated May 2010 | |
| England | Hertfordshire | Large | Terminated March 2006 | |
| England | Hertfordshire | Large | Terminated March 2007 | |
| England | Hertfordshire | Large | Terminated December 1985 | |
| England | Hertfordshire | Large | Terminated May 2007 | |
| England | Hertfordshire | Large | Terminated October 2001 | |
| England | Hertfordshire | Large | Terminated August 2009 | |
| England | Hertfordshire | Large | Terminated June 1997 | |
| England | Hertfordshire | Large | Terminated December 1997 | |
| England | Hertfordshire | Large | Terminated August 2004 | |
| England | Hertfordshire | Large | Terminated December 1997 | |
| England | Hertfordshire | Large | Terminated February 2006 | |
| England | Hertfordshire | Large | Terminated December 1997 | |
| England | Hertfordshire | Large | Terminated March 2002 | |
| England | Hertfordshire | Large | Terminated June 1998 | |
| England | Hertfordshire | Large | Terminated December 1999 | |
| England | Hertfordshire | Large | Terminated February 2009 | |
| England | Hertfordshire | Large | Terminated October 2019 |