Sky Witness Channel Breaking up

[Soo1701]

This is only on Sky Witness channel - all other channels ok.

Picture is breaking up regularly making programmes impossible to watch. Programme gets very pixelated in bright  blocks of colour across the screen and about half way up.

[Annie+UK]

What are your Signal Strengths/Qualities? Take a look at the link below:

See question Q11 in my Sky Plus F⋅A⋅Q for Signal Strengths/Qualities

[Soo1701]

Thanks i'll have a look.