Its only £5.99 per month to take a 12 month contract with Primus through Moneysavingexpert.com for line rental or £6.99 per month for a 12 month contract with evening and weekend calls included. This would appear to be a great deal cheaper than the Southern Electric deal for anyone who objects to BT's exorbitant £15+ per month line rental for almost nothing other than inclusive weekend landline calls.
See
http://www.moneysavingexpert.com/phones/home-phone-calls#cheaplineThe only thing to watch out for with Primus is that they have something of a reputation for unreliable billing, although this mainly seems to relate to broadband where they don't advise customers if they exceed their monthly data cap and then have very substantial charges if you beyond that cap. Their customers services also reputed to be very difficult to get through to on the phone. There is however an email address for their Chief Executive at:-
http://www.ceoemail.com/s.php?id=9624See
http://www.moneysavingexpert.com/phones/home-phone-calls#cheapline for more details on the Primus £5.99 and £6.99 per month packages.
The only other point to watch out for is this appears to be a special cheap deal for new customers of Primus via MoneySaving expert. In Year 2 expect them to charge you their regular monthly rate of £11.39 per month for evening and weekend calls as currently shown at
http://www.primussaver.co.uk/HomePhone.aspx However this is little more than the Southern Electric deal after a much cheaper first year and includes all your evening and weekend calls although about the same as BT's Line Advance Deal for 12 months up front although that only includes Weekend Calls.