| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| England | Hertfordshire | Large | Terminated January 2007 | |
| England | Hertfordshire | Large | Terminated June 2000 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated September 2001 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated June 2000 | |
| England | Hertfordshire | Large | Terminated August 2008 | |
| England | Hertfordshire | Large | Terminated January 2004 | |
| England | Hertfordshire | Large | Terminated January 2001 | |
| England | Hertfordshire | Large | ||
| England | Hertfordshire | Large | Terminated April 2001 | |
| England | Hertfordshire | Large | ||
| England | Hertfordshire | Small | Terminated November 2006 | |
| England | Hertfordshire | Small | Terminated March 2017 | |
| England | Hertfordshire | Large | ||
| England | Hertfordshire | Large | Terminated February 2016 | |
| England | Hertfordshire | Large | Terminated January 2016 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated March 2019 | |
| England | Hertfordshire | Large | Terminated April 2015 |