| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| England | Hertfordshire | Large | Terminated October 2005 | |
| England | Hertfordshire | Large | Terminated December 2001 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated July 2002 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated March 2009 | |
| England | Hertfordshire | Large | Terminated April 2006 | |
| England | Hertfordshire | Large | Terminated June 2003 | |
| England | Hertfordshire | Large | Terminated July 2003 | |
| England | Hertfordshire | Large | Terminated May 2016 | |
| England | Hertfordshire | Large | Terminated July 2006 | |
| England | Hertfordshire | Large | Terminated July 2012 | |
| England | Hertfordshire | Large | Terminated December 2014 | |
| England | Hertfordshire | Large | Terminated September 2013 | |
| England | Hertfordshire | Large | Terminated June 2019 |