I seem to be having the same problem, I have just come back after a fortnight out of the country
I had recording set for one of the prog on BBC4 a week sat it broke up a little on the recording.
But now I seem to be having a lot more break ups especially film 4
tried another box same problem so I am thinking it is Dish.
BUT tried box on a different dish same bungalow (I have 2 dishes)not by choice !!
so I am a bit perplexed why happening now ???
HDR1000s 500gb (since first came out)