If you're with Virgin Media check your bill
I received my Virgin Media phone bill (landline) this week so I checked the bill and was surprised to see a chargeable call to my Virgin mobile. This might not seem like a big deal but I take their talk unlimited service so calls to Virgin mobiles are free 24/7 as long as it's under 60 minutes.
So I emailed Virgin about this and the reply was that my mobile is not with Virgin which is funny as I've had this number for 7 years and it's definitely a Virgin mobile. Makes me wonder how many other times I've been charged for calls that are supposed to be free as this call was only itemised because it was over 50p... well the call was £0.59 but it's the principle!