They told me over the phone before my arrival that they were sure that the picture breakup as well as loss of channels on their SKY TV was due to a bird nesting at the back of the Dish.
Although I have noticed pigeon and doves nests in this position before this was the first time I had been called out to a sitting / nesting bird.
As I walked down my customers drive I immediately noticed the dish and resident Collared dove on the side wall of the property, breathing a sigh of relief I was sure that what ever the cause of the problem this Collared dove was not going to be to blame.
As always, I stood directly underneath the dish, then using the LNB arm that protrudes out from the dish I followed an imaginary line in the direction of the Astra satellite to see what might be blocking the dishes view.
In this case it was part of a very large hawthorn tree / hedge barely 3 meters in front of the dish, I guess with all of the rain we have been having recently it's put a bit of a spurt on over the past few weeks. Anyway this particular problem was easily solved after just 5 minutes of pruning the SKY pictures were restored to their full glory and the Collared dove was left in peace to continue rearing it's brood of two.