If your TV Aerial is pointing towards this transmitter then poor reception or no reception of the BBC channels can be expected until the fault is rectified.
I have no further information regarding this current fault other than I would expect the problem to be resolved as a matter of urgency as there are thousands of households affected.
My advise for this particular fault goes against what I normally advise but if this problem persists then an automatic retune of your TV or Set Top Box may just return the BBC channels to your TV guide.
As mentioned above, I would normally advise AGAINST the retuning of TVs when you experience reception problems as this can often make the situation worse but on this occasion it may be the only way to get the BBC back. If the fault continues beyond this coming weekend then the tuning of your TV will NOT cure the problem and so for this reason I would recommend trying the auto re-tune only once or twice per day.
If you require any further information regarding this fault and or the tuning of TVs or any other reception fault for that matter then please don't hesitate to contact me via my mobile during the working day or at home up until 8pm each evening.
Mobile - 07850 969 307
Home - 01905 799152