I use 08452443443 then dial the number...it's about 3p a minute and no connecting fee or monthly fee...it's supposed to be only evenings and weekends, however I've called several times during the day, and only one time has it cost more....that's from a landline.
At my moms, she just calls straight, as they were given a rate that was only supposed to be for people in Ohio (through dad's work), but since they gave it to them, they couldn't take it back...it's only 3 cents a minute, no connecting fee or monthly fee...and no number to call...well, other than the one you need to...nothing extra to dial! And that works for days, evenings, weekends...any time at all!