The security of the BT hub leaves a lot to be desired, I got mine because I they offered me the Voip service for free. When I came to set it up I looked at the manual and could find no mention of WPA encryption at all, the only security mentioned was to enter the serial number of the router into the WEP box.
So I rang the help desk and the person I spoke to didn't even know what I was talking about.
I found WPA eventually. But it's a bloody awful setup menu, very difficult to find your way through (or at least it was 2 years ago when I got mine).