Today has seen a lot of pixellation and loss of channels, in exactly the same manner as the recent area-wide problem in Peterborough a few weeks ago, which lasted quite a few days.
Image breaking up into lots of coloured squares, an error message about loss of signal etc. Intermittent but fairly regular throughout the day so far.
I mention this mainly to see if the issue can be investigated at source, seeing as how this is a previous, widespread, problem. Not because I want an engineer. Yet!