| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| England | Hertfordshire | Large | Terminated May 2021 | |
| England | Hertfordshire | Large | ||
| England | Hertfordshire | Large | Terminated April 2021 | |
| England | Hertfordshire | Large | Terminated July 2021 | |
| England | Hertfordshire | Large | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated December 2014 | |
| England | Hertfordshire | Large | Terminated February 2014 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated October 2003 | |
| England | Hertfordshire | Small | Terminated April 2005 | |
| England | Hertfordshire | Large | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | Terminated June 1998 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small |