There was alot of discussion when Be users migrated over to Sky about bridge mode. Turns out one of the solutions is to use an old BT internet router - Voyager 220V or similar.
The old BT ones go for a few quid on ebay, but if anyone needs one I now have mine spare after moving to a different service. The current black Sky hub seems to work in the same way, but you will only get one if you plead with Sky (they "gave" you the old Be router which they claim works but doesnt) or upgrade your package.
If anyone needs information how to do this (it uses the DMZ/Ip-forward feature) let me know. Many tried similar settings on other routers and it doesnt seem to like it.