Update:
I did have the aerial cable split with a Y connector with one going to the Tv the other to the Humax.
So I connected the Humnax directly to the socket in the wall and all the sations tuned in.
But............................
Now I get some of them pixelated from time to time. C5 and Film 4 but also the HD channels too although less frequently. I did not have this when I could only get some of the channels and the aerial cable was split.
This is really annoying as the TV, the old Humax and the kitchen Tv all get all the channels all the time with no pixelation.
As far as the signal strength I get 100% for Quality and about 30% to 50% (max) for strength.
I cannot understand why the Fox T2 apparently needs a stronger single strength to work tham my £900 Samsung HD TV does.