Hi Paul
We did have a power cut a few weeks ago but I'm not sure if I had the B2 running at the time. But no, it has never frozen requiring a reset. The only thing that I did notice was that the clock had for some reason moved on by one hour. I reset this with no problem but it seems a bit odd.
Anyway, I think it's just one of those "unexplained" events and I will reset the radio presets, then do a Save straight after. I'll also keep on eye on the presets and report if it happens again.
Thanks for your help.
Chas