LOST CHANNELS?

About a week ago I lost bbc1 and 2 and possibly others on my Panasonic lxd70 from the digital scan .Although I still have them on analogue I have to switch modes to view.I did a rescan and it never finds them other than on analogue.I even reset to shipping condition and did automatic install but no difference.All the other digital signal strenght are 10s. I had BBC 1 and 2 before so where are they now? my next door neighbours got them. did a software search and it was running the latest software. Any help would be appreciated. Thanks,

Rob ,Portsmouth.