| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| England | Hertfordshire | Large | Terminated December 1998 | |
| England | Hertfordshire | Large | Terminated March 2006 | |
| England | Hertfordshire | Large | Terminated August 2002 | |
| England | Hertfordshire | Large | Terminated January 2001 | |
| England | Hertfordshire | Large | Terminated January 2010 | |
| England | Hertfordshire | Large | Terminated November 2018 | |
| England | Hertfordshire | Large | Terminated September 2006 | |
| England | Hertfordshire | Large | Terminated June 2000 | |
| England | Hertfordshire | Large | Terminated January 2002 | |
| England | Hertfordshire | Large | Terminated November 2017 | |
| England | Hertfordshire | Large | Terminated October 2001 | |
| England | Hertfordshire | Large | Terminated December 2013 | |
| England | Hertfordshire | Large | Terminated March 2006 | |
| England | Hertfordshire | Large | Terminated July 2002 | |
| England | Hertfordshire | Large | Terminated July 2011 | |
| England | Hertfordshire | Large | Terminated January 2006 | |
| England | Hertfordshire | Large | Terminated June 1999 |