Since this change occurred (and the transponder(?) change to BBC 1 HD, instead of the previously perfect reception I am getting (sometimes severe) pixelation and artefacts on these 2 channels - despite 90-100% signal strength and 100% quality. Even a slight shower of rain makes things worse, although the effect on the signal strength is only minor (e.g. down to 80%).
Setup: Foxsat HDR, location SW France, 80cm dish.
Reception of ITV HD and Channel 4 HD is unaffected.
All suggestions gratefullly received!