| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| England | Hertfordshire | Large | Terminated June 1999 | |
| England | Hertfordshire | Large | Terminated July 2003 | |
| England | Hertfordshire | Large | Terminated December 1997 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated May 1994 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated May 1994 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated April 2005 | |
| England | Hertfordshire | Large | Terminated July 2002 | |
| England | Hertfordshire | Large | Terminated December 1983 | |
| England | Hertfordshire | Large | ||
| England | Hertfordshire | Small | Terminated February 2007 | |
| England | Hertfordshire | Large | Terminated December 1991 | |
| England | Hertfordshire | Large | ||
| England | Hertfordshire | Large | Terminated May 1994 | |
| England | Hertfordshire | Large | Terminated April 2005 | |
| England | Hertfordshire | Large | Terminated November 2005 | |
| England | Hertfordshire | Large | Terminated August 2001 |