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Tuesday 13 April 2010, 10:36
Over on the Radio 4 blog Mark talks about his decision:
I will be leaving a job I have loved in October. I will miss almost all of it. But I always felt that I should not do much more than seven years as Controller of Radio 4 and by October I will have had the best job in the BBC for six of those years.
To read the full post and to leave a comment, head over to the Radio 4 blog.