I have the unlimited evenings and weekend plan but on my (paperless) phone bill it lists the summary of these calls with a 6p charge.

Looking at the details, all the calls are listed as 0p. Just that adding up all those zeros BT have managed to get a total of 6p.

It's not even worth ringing them but I'm curious and wondered if anyone had any idea.

Minimum charge?

Hi Tern,
Email your account details to btcare@bt.com and i will have a look at this for you. Include your forum username and copy & paste your post or else include a link to the thread so that I can identify you.

Many Thanks
Donna
BT Support