| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| England | Hertfordshire | Large | Terminated November 2016 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated December 2017 | |
| England | Hertfordshire | Large | ||
| England | Hertfordshire | Large | Terminated September 2012 | |
| England | Hertfordshire | Large | ||
| England | Hertfordshire | Large | ||
| England | Hertfordshire | Large | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | ||
| England | Hertfordshire | Large | Terminated October 2004 | |
| England | Hertfordshire | Large | Terminated June 2000 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated August 2008 | |
| England | Hertfordshire | Large | Terminated February 2015 | |
| England | Hertfordshire | Large | Terminated January 1995 | |
| England | Hertfordshire | Large | Terminated June 2000 | |
| England | Hertfordshire | Large | Terminated May 2001 |