I've looked on the Internet and got some vague answers, but no direct answer. Any necks around here know?
![Smile :)](./images/smilies/icon_e_smile.gif)
Nah it's just a little curiosity of mine. The local transmitter by me relays SC all the time and I know the BBC has a nationwide backup RBS system in place all the way down the chain, would just be interesting to know which way it goes exactly