no free view tv half the time. and only half of sky tv ariel all ok any one else having trouble
Loss of some Sky channels but not all is indicative of the relatively weak signal the Sky platform uses but can also point to a rusted dish or faulty LNB.
If you have an older Sky box ie Sky + or the standard definition model before, if I remember right, you can plug a terrestrial aerial into it and watch Freeview through the box via an ordinary aerial without the box being switched on.
If your set up is like this, have a look at your dish. If it is showing signs of being quite rusty, Id suggest that's your problem.
If you have a separate terrestrial aerial plugged into the tv and both Freeview and some Sky channels are unavailable, that suggests atmospheric and terrestrial transmitter issues.