The fault is consistent, Mixture. There is a very long list of codes and fault messages, and a caption that says that the problem message is forwarded to Apple, os I think that I will just have to wait a while for it to be fixed. I will try another clean install in a week or so and see if things have been solved.
I can still stream programmes which really is fine. I will be back in the UK soon so will be able to record them on the DVD recorder at home in the normal way.