| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| England | Hertfordshire | Large | Terminated March 2018 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated January 2001 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated June 2008 | |
| England | Hertfordshire | Large | Terminated June 2014 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated March 2006 | |
| England | Hertfordshire | Small | Terminated July 2002 | |
| England | Hertfordshire | Large | Terminated June 2001 | |
| England | Hertfordshire | Large | Terminated July 2001 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated August 2012 | |
| England | Hertfordshire | Large | Terminated May 2005 | |
| England | Hertfordshire | Large | Terminated July 2013 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated May 1994 | |
| England | Hertfordshire | Large | Terminated August 2004 |