Re the above posts by JHW and Jos, I wholeheartedly agree. Announcements being made while being overshadowed by completely irrelevant noise.

If the anouncement / trailer is meant to be heard why cover it up.

If the BBC is so hard up think of how much could be saved on noisemakers' royalties and the cost of recording the stuff.

I often miss programmes because if this including many excellent natural history programmes on TV. David Attenborough's programmes being a prime example. Haven't watched one for some years.