For those of you who followed my previous, now removed post regarding the Pace Twin now unwatchable due to some strange reception problem - heres the answer. You wont believe it - but stay with me on this. Outside my house there is a long row of lamp posts. At night, they come on automatically (as lamp posts do). Apart from one. Now, it appears that this little lamp post in the distance spends its nights going on and off randomly, whenever it feels like it. And heres the answer - when its on, so it my digital Tv. When its off, so is my picture. Honest. This explains all my problems - Tv is fine during the day (when its light) and only plays up at night. Ive checked with the BBC website, and the screen shots of TVs with electrical interference matches mine perfectly. So there you go! Thanks for all the help from you guys previously, and sorry I hastled you all with this. No idea what Im going to do now though!