I'm wondering if the U.K. is experiencing a similar trend as here in the U.S.: more and more cell phone users are taking out of service their home land line telephones, causing their cells to be burdened with 100% of their personal phone communication needs.
Indeed, it seems like it's been a while now since a home address and phone number could be taken for granted as being associated with one another; now that association is with an individual, not the address where they live, as it once was (other than their work phone #, of course).