The controller of Radio 2, Lesley Douglas, has resigned over the lewd calls row involving Russell Brand and Jonathan Ross.
Here is her resignation letter to BBC director general Mark Thomson in full.
The last week has been a painful one for the BBC and particularly for BBC Radio 2.
It is with enormous regret that I have decided to resign as controller of BBC Radio 2, BBC 6 Music and of Popular Music.
This is my decision alone.
Over the 23 years of my career at the BBC I have enjoyed a deep love and respect for both the audience and the BBC.
The events of the last two weeks happened on my watch. I believe it is right that I take responsibility for what has happened.
It is a matter of the greatest possible sadness to me that a programme on my network has been the cause of such a controversy.
I would like to take this opportunity to offer my personal apology to Andrew Sachs and his family and to the audience for what has happened.
It has been a huge privilege to have been entrusted with the leadership of the UK's most popular radio station, which is so intensely loved by the audience.
I have also had the tremendous pleasure of launching BBC 6 Music and more recently of leading popular music output across the BBC.
I know I leave BBC Radio 2 and 6 Music in the hands of a dedicated and passionate team of incredibly talented presenters and production staff.
I am enormously proud of what we have achieved together.