Rayner says she "deeply regrets" her decision not to question underpayment of tax, while PM says he's "very sad".

Angela Rayner has resigned as both deputy prime minister and housing secretary after an investigation into unpaid stamp duty on her new Hove flat.

Well, that was slow and painful. It remains a mystery why, with so much precedent on which to depend, ministers still take this long to resign, even when they must know that they’re bang to rights. And so it has proved with Angela Rayner,