Some PVR's are very sensitive to receiving the same channels from different transmitters (essentially they will try to place competing versions of BBC1 etc etc in the same EPG slot and the EPG won't function properly). So you should manually tune the MUX's you want to receive by preference if you receive two or more transmitters. At the same time DSO is in stages (usually BBC2 goes first followed by the rest some days later) and everyone will have a final retune when the very last analogue is turned off in a year or so. At various stages some of the MUX's will also have their power increased so you might not receive all the promised channels immediately. In the worst cases the start/end period will have lasted almost 5 years. Some countries did it in a single day (even very big ones like Spain managed that). Why has the UK take so long? Lots of well paid jobs for political appointees might be one reason.