The fallout from the local elections continues. Cabinet ministers are told by an MP to challenge PM, or she'll try and trigger a leadership race: will it work? BBC Political Editor Chris Mason has the latest. Lord Blunkett and James Harding, Chloe Hubbard and Michael Booker editors of the Observer, The Mirror and GB news react. Also on BH: a look at what's next in England, Scotland and Wales for the incoming parties, and BBC Russia Editor Steve Rosenberg sends an audio postcard from a very different World War Two Victory Parade in Moscow's Red Square.