Thanks for all your replies, and the kind offer of help from Debsy42. Last months bill was over £75.00, it is normally £25/£30.
I expected a higher bill, my niece has just had a baby and my wife has been ringing those rip of TV/Phone sytems that are installed in the local hospital, it is the 0900 numbers that have just started to appear. The most worrying thing is my daughter insists ( and I believe her ) that she is not responsible.