| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated June 2000 | |
| England | Hertfordshire | Small | Terminated July 2005 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated March 2008 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated October 2003 | |
| England | Hertfordshire | Large | Terminated June 2000 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | Terminated November 2004 | |
| England | Hertfordshire | Large | Terminated August 2004 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | Terminated May 2006 |