Just saved £42 by removing caller display and BT answer 1571 from our calling features online at BT.com. Sneaky b*stards ramping up their charges on the sly.
Vaguely remember email informing us but didn't think it would apply as we are only 6mths into a 18mth contract.... No apparently to get it for free we have to get a new 12mth contract (clearly hoping we will forget to cancel again.....)
You can remove it by logging into BT account online. Find calling features. Not too tricky but a little effort