| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated February 2006 | |
| England | Hertfordshire | Large | Terminated February 2006 | |
| England | Hertfordshire | Large | Terminated January 2001 | |
| England | Hertfordshire | Large | Terminated July 2006 | |
| England | Hertfordshire | Large | Terminated February 2006 | |
| England | Hertfordshire | Large | Terminated February 2004 | |
| England | Hertfordshire | Large | Terminated January 2001 | |
| England | Hertfordshire | Large | Terminated March 2009 | |
| England | Hertfordshire | Small | Terminated February 2019 | |
| England | Hertfordshire | Small | Terminated August 2020 | |
| England | Hertfordshire | Small | Terminated February 2021 | |
| England | Hertfordshire | Small | Terminated February 2019 | |
| England | Hertfordshire | Small | Terminated February 2021 | |
| England | Hertfordshire | Small | Terminated June 2018 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated April 2006 |