I heard that was coming, but for a different reason. Not sure if true but seems like P4U were causing O2 a major headache by catching customers out and putting them on new contracts rather than upgrades. Extra commission for P4U, and customers being left with 2 accounts, and O2 having to pick up the pieces.
I work for O2, however I am here in an unofficial capacity. My views are my own, and not reflective of O2.