Hi. Picture breaking up on BBC1 & 2. Commercial channels are perfect. For the last few weeks we have been suffering dropouts and chopped audio on TV channels BBC1 & BBC2. All commercial channels are fine. The dropouts are totally random, sometimes just the odd breakup, other times no signal at all, select ITV and perfect signal. We have two TV's and both suffer the same problem, we have tried re-tuning both in case they both were out of tune but of course they were fine and it made no difference. We have a High Gain aerial with some sort of box attached to the chimney and in our loft a signal booster 'Vision' tm. I checked when it was all installed and it was 2007 so 11 years old. I am thinking that maybe either it is failing, or it's the box on the chimney. If its the one on the chimney I will need to get someone in to sort it, if it's the Vision booster I can get one on Amazon for a lot less than a call out! Any suggestions appreciated or a way to check the Vision Booster ?