While I use my mobile more i definitely use the landline for some local numbers. Taxi ordering - because then I just have to press a number to get the cab to come to the house asap. Takeaways which are loaded in to the speed dial (which I will probably have to change) and friends in our old...
http://www.area-codes.org.uk/01273-phone-number-changes.php
Not sure if anyone was aware of this but I certainly wasn't until stumbling on it on FB. OFCOM apparently trialing a new way of extending landline numbers.