Understood. Don't usually use BBC4 HD just BBC4 but have watched HD at intervals for past two days and see no problems. Would however say that for the past couple of years I have seen degrading of the signal from Sandy Heath with the loss of signal on a number of channels. Have taken them to task over it, especially as I know someone who lives very close to the transmitter and we cross check when problems occur, and we have similar problems but often to a lesser degree. We believe that as these resources are now privately run they, at times, reduce signals power on a number of band widths and weather, therefore, has a greater effect on the signal quality which didn't used to happen. The transmitter does not agree with that analysis.