Got our bill yesterday (6 days after the bill date, thankfully we are on DD) with an extra £31.50 telephone charge, this was on top of the free phone line offer ending so we were somewhat alarmed at a bill being almost double that we are used to.
Hubby spoke to billing dept and the extra was a billing input error and has been removed (we shall see at the beginning of next month if this has been done).
Don't forget to check your bills if you are on DD.