Mr. Liam Duggan:

The concept was considered but unless the codes are in use, they are of no use. It is all very well to tell someone this is the code for his or her address but if he or she cannot use it, for example, to identify his or her address to the emergency services or to contact a logistics company to ask for a delivery, the only purpose of the pilot would be to inform people of the code for their address. As there was no usage involved, the idea of having a pilot was pointless.