| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| England | Hertfordshire | Large | Terminated August 2004 | |
| England | Hertfordshire | Large | Terminated June 1999 | |
| England | Hertfordshire | Large | Terminated February 2001 | |
| England | Hertfordshire | Large | Terminated February 2015 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated April 2020 | |
| England | Hertfordshire | Large | Terminated November 2000 | |
| England | Hertfordshire | Large | Terminated November 2000 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated July 2000 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated December 2008 | |
| England | Hertfordshire | Large | Terminated June 1999 | |
| England | Hertfordshire | Large | Terminated February 2006 | |
| England | Hertfordshire | Large | Terminated February 2001 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated March 2002 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small |