Ok, so Ive been with talktalk for over 12 months now, great deal -16.49 a month for line rental, evening calls to landline and international calls, with free broadband- happy so far!
But tiscali do the same thing for £2-ish less a month.
Had no intention of moving- far too much agro, but called and said I would!!!- Given £2 off per bill for next 12 months.
Check out the tiscali link at options 1 and 2 so you know your onions!! http://www.tiscali.co.uk/products/talk/?code=ZZ-NL-11XY
£24 saved over the year for a 15 minute phone call :)