| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| England | Hertfordshire | Large | Terminated November 2021 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated February 2022 | |
| England | Hertfordshire | Large | Terminated February 2019 | |
| England | Hertfordshire | Large | ||
| England | Hertfordshire | Large | Terminated January 2003 | |
| England | Hertfordshire | Large | Terminated October 2000 | |
| England | Hertfordshire | Large | Terminated March 2014 | |
| England | Hertfordshire | Large | Terminated February 2006 | |
| England | Hertfordshire | Large | Terminated February 2021 | |
| England | Hertfordshire | Large | Terminated January 2008 | |
| England | Hertfordshire | Large | Terminated June 2003 | |
| England | Hertfordshire | Large | Terminated September 2020 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated March 2016 | |
| England | Hertfordshire | Large | Terminated February 2015 | |
| England | Hertfordshire | Large | Terminated January 2002 | |
| England | Hertfordshire | Large | Terminated October 2003 | |
| England | Hertfordshire | Large | Terminated February 2019 |