Hi Fairy1ights,
A warm welcome to our community 
I'm sorry to hear you're having trouble accessing the BBC 1 channel. Is this still an issue today?
I have taken an initial look at your box remotely and all looks fine signal/power level wise. If you're still having trouble accessing this channel, let me know a bit more about what's happening please.
* Do you get an error message/code?
* Is the screen blank?
* Have you rebooted the TiVo® to refresh things over?
I'm here to help so please keep me posted.
Collette