Well after a few days I received notification that they had received the computer. Later that day I received notification that it was on its way back! I received it the next day, with a report saying that the screen had been changed as the old one had a crack! I assume this was internally as there was nothing obvious externally. Anyway its been going now for around a week with no challenges so, hopefully, that was the issue. A bit of a faff but at the end of the day HP did the job and got it sorted.
So I treat myself to a new 2tb SSD external drive to store everything on, which is noticeably quicker than the old HDD and quite a bit smaller. So in a device around 2″ square, i.e. smaller than a floppy disc, and less than 10mm thick I store around 500 albums, all my articles (around 200 now), around 20 thousand photographs and all my other paperwork, documents, etc.. etc.. And it all takes up less than half the drive capacity. Pretty amazing really.
Lets hope for a few years of trouble free reliable computing! We can only hope.