| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated September 2005 | |
| England | Hertfordshire | Large | Terminated August 2004 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated June 2000 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated December 1996 | |
| England | Hertfordshire | Large | Terminated December 1998 | |
| England | Hertfordshire | Large | Terminated August 2002 | |
| England | Hertfordshire | Large | Terminated February 2006 | |
| England | Hertfordshire | Large | Terminated October 2001 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small |