Title: Not very good
Date: 4/16/2005 6:48:09 AM
Marginally better than most other examples here, only about 615 slipped through the net as 'valid' from 1423 invalid postcodes.
Title: Extra alpha allowed
Name: Stephen Jones
Date: 12/2/2004 12:13:54 PM
CF14T 3EW passes but it shouldn't
you have [0-9]?[A-Z]?
- i.e. zero or one digit and zero or one alpha