Who will replace Cressida Dick?

<div>Cressida Dick announced yesterday evening that she is stepping down as head of the Metropolitan Police. In a statement, Dick said she had been left with 'no choice' but to resign, after it was made clear to her that London mayor Sadiq Khan did not have confidence in her leadership. <br> <br> Who will replace her? And what does her resignation mean for the investigation into parties in No. 10?<br> <br> Katy Balls speaks to James Forsyth.</div>