Around the edge or down the sides. Can you seen any picture at all or what?
Only thing I can think of is that it is an HDMI handshaking problem in which case things to try
1) Make sure the HDMI cable is securely plugged in at both ends;
2) Try a different HDMI cable;
3) Try cycling through the different screen resolutions your TV sets offers;
4) Set screen resolution on the TV set to Auto and try cycling through the different screen resolutions on the Youvie box.
Yes I know that's what I meant. It's a hdmi to scart connector
Is this on all channels or just the BT pay ones, i.e. those appearing from 300 and above in the EPG?
If it's just those, how have you connected the box to the Home Hub?
If it's all, then your HDMI to SCART converter is likely to be the cause
Whcih box do you have? If it's the recording box with the silver and black front then that has a SCART socket.