| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Essex | Large | Terminated June 2000 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Essex | Large | Terminated June 1999 | |
| England | Hertfordshire | Large | Terminated August 2009 | |
| England | Hertfordshire | Small | ||
| England | Outer London | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated November 2002 | |
| England | Hertfordshire | Large | ||
| England | Hertfordshire | Large | Terminated June 1998 | |
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Essex | Small | Terminated June 1999 | |
| England | Hertfordshire | Large | Terminated April 2015 | |
| England | Essex | Large | Terminated January 1995 | |
| England | Essex | Small | Terminated June 1999 | |
| England | Hertfordshire | Small |