Hi, and thanks for all the replies!
Paulyoung666: I do have Broadband as well.
Danielf: My DVD is connected via S-Video and a similar problem occurs.
Scooby: Have tried a different scart cable but to no avail.
I have a TV engineer coming Saturday and I'm hoping this might shed some light on matters.
In the meantime I will try NTL CS - whilst exercising great patience!!
If anyone else has any further suggestions please let me know.
Many thanks to you all!
Glanv