"Sky has just launched a new free service for blocking unwanted calls called Sky Talk Shield. Read about it here. Why can't TalkTalk provided a similar sort of thing instead of the meagre 10, or even 100 as promised, last number blocking that is available now? It looks like it works like those BT phones where you can input a safe list of numbers who can call you and a blocked list of numbers that won't get through, and the rest get screened and have to identify themselves. I think there would be many TalkTalk customers who would welcome this sort of service."
If Sky can do it I'm sure TalkTalk could come up with something along the same lines.