| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Outer London | Small | ||
| England | Outer London | Small | ||
| England | Hertfordshire | Small | ||
| England | Outer London | Small | ||
| England | Hertfordshire | Small | ||
| England | Outer London | Small | Terminated February 2004 | |
| England | Outer London | Small | ||
| England | Outer London | Small | ||
| England | Outer London | Small | ||
| England | Hertfordshire | Small | ||
| England | Outer London | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Small | ||
| England | Hertfordshire | Large | Terminated February 2006 | |
| England | Hertfordshire | Large | Terminated August 2001 |