Plot: No prizes for identifying the real hero of Richard Strauss’s Ein Heldenleben. With its swashbuckling self-confidence and self-mocking humour, this ‘Hero’s Life’ is very much the world according to Richard Strauss – an exuberant, off-the-scale showpiece for the Oslo Philharmonic, making its first Proms appearance under its recently appointed and widely acclaimed Chief Conductor Klaus Makëlä