The Bookseller has reported:

Sarah Odedina has resigned from her position as children’s publisher at Oneworld saying she did not receive the necessary support to build her list.

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She leaves the company with immediate effect.

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Odedina joined Oneworld in May to launch Young Adult imprint Rock the Boat… [She] told The Bookseller that she was "not given the support or trust that would be essential to build a successful list". 
 
Odedina was previously m.d. at Hot Key Books, a role she left in November 2014.
 

full report via Odedina leaves Oneworld | The Bookseller.