Right in answer to my own question can I use it to send freeview arial signal to other smart boxes
Yes I can they are simply co-ax cable using f connectors
The junction boxes are literally splitters look closely they have an in and 2/3 out
So your ariel goes onto the inbthe destination connectors out feed the signal to tv, smart boxes etc
So it saves you a heap of threading ariel around
Your telephone socket is just that a telephone socket
Open reach only run the phone line to the house you have to complete the destination
So get the open reach guy to just link the virgin input to the open reach box
Again it will save you a lot of work.
Oh and virgin eventually called me about remaining with them
They offered to match vodafone price of broadband and telephone.
I gave them the chance to come to the party they refused it was only when I called cancelling my service suddenly the could get it cheaper for me
As another aside my phone and tablet were always hunting for virgin broad band
Vodafone connects and stays connected so better service all round