Sky - lost a number of channels Since the heavy rain last night I have lost the signal to a limited number of Sky channels - they are coming up with a very fuzzy picture and no sound. This includes an odd mix of channels like Challenge, a lot of news/documentary/history channels in the 500 range etc including the discovery channels. It isn't the first time this particular group of channels have gone - sometimes for weeks before they appear back again. I have a communal dish and a Thomson box - I presume this is due to the rain/wind having put the communal dish out of alignment but why does it only seem to affect this range of channels. Just a little annoying - so would welcome any advice as to why these channels (the 500 range) keep going?!