Brown wants to shut Harman up. She apparently wants rid of him. He's still the PM for the present, so has the power, but for how much longer?
Or is this all just a Sunday newspaper story? I very much doubt that life in the Downing Street bunker this morning is all sweetness and light - specially as Harman is due shortly to appear on the Andrew Marr Show. The morning toast and marmalade will probably taste more 'bitter' than usual.