| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| England | Hertfordshire | Large | Terminated April 2001 | |
| England | Hertfordshire | Large | Terminated September 2007 | |
| England | Hertfordshire | Large | Terminated November 2018 | |
| England | Hertfordshire | Large | Terminated September 2000 | |
| England | Hertfordshire | Large | Terminated September 2000 | |
| England | Hertfordshire | Large | Terminated December 1999 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated November 2018 | |
| England | Hertfordshire | Large | Terminated April 2002 | |
| England | Hertfordshire | Large | Terminated December 1999 | |
| England | Hertfordshire | Large | Terminated February 2006 | |
| England | Hertfordshire | Large | Terminated December 1998 | |
| England | Hertfordshire | Large | Terminated June 2008 | |
| England | Hertfordshire | Large | Terminated June 1999 | |
| England | Hertfordshire | Large | Terminated July 2006 | |
| England | Hertfordshire | Large | Terminated June 2000 | |
| England | Hertfordshire | Large | Terminated July 2000 | |
| England | Hertfordshire | Large | Terminated September 2001 | |
| England | Hertfordshire | Large | Terminated April 2012 | |
| England | Hertfordshire | Large | Terminated February 2013 |