my mother has a large number of these on her bill and i want to try to block the premium numbers
Have you ever managed to work out how the 09 calls were being generated from your mum's line since you originally posted about it in June?
Your post from June possibly sounded like a missed call scam where the phone rings briefly then stops and the recipient returns the call to find out who it was but is in fact unknowingly calling a premium number.
You can look up individual premium rate numbers on the PSA website and find out who they belong to which might give you further clues as to what is going on
Also worth noting that, in the last few weeks/months, there have been several posts on the forums from customers complaining about unexpected charges on their accounts (some of whom claimed they did not even have a phone plugged in). The last one I noticed on here was also in relation to 09 numbers