Thanks Guys.
You have confirmed my beliefs. So now I have another question....
OK....
Cable 1 output from V+ Box to LOFT Amplifier
Cable 2 output from Roof Aerial to LOFT Amplifier
1 cable out for each room (Assuming now I have bought either Freeview TV or Box)
Diplex Box in each room and I will still get Cable and Freeview through1 cable ?