Guido understands that this landed in Ian Katz’s inbox this morning:

“We would like to express our anger and disappointment at your tweet following Newsnight’s interview with Rachel Reeves. It is completely unacceptable for a senior BBC editor to have expressed this view, whether or not you intended for it to be made public. It is vitally important that the Labour Party, our Shadow Cabinet and Newsnight viewers have confidence in the impartiality and fairness of your programme, and the criteria on which guests and interviews are judged. This incident undermines that confidence and it is important that this is redressed. Although a tweet of apology has been made, a full written public apology should be made by the end of the day.”

The new job is going well then…